diff --git a/client/src/components/media-thumbnail.tsx b/client/src/components/media-thumbnail.tsx
index a515b03..810a7a0 100644
--- a/client/src/components/media-thumbnail.tsx
+++ b/client/src/components/media-thumbnail.tsx
@@ -1,11 +1,12 @@
-import { useState } from 'react';
-import { ImageIcon, VideoIcon } from 'lucide-react';
+import { useState, useRef, useEffect } from 'react';
+import { ImageIcon, VideoIcon, Play } from 'lucide-react';
 
 interface MediaThumbnailProps {
   src: string;
   alt: string;
   type?: 'image' | 'video';
   className?: string;
+  thumbnailUrl?: string;  // Optional pre-generated thumbnail
 }
 
 function isVideoUrl(url: string): boolean {
@@ -14,15 +15,85 @@ function isVideoUrl(url: string): boolean {
 
 /**
  * Renders a media thumbnail that handles:
- * - Local video files: uses <video preload="metadata"> to show first frame
+ * - Local video files: captures first frame as thumbnail
  * - Images: standard <img> with lazy loading
  * - Broken/unavailable URLs: shows a placeholder icon
  */
-export function MediaThumbnail({ src, alt, type, className = "w-full h-full object-cover" }: MediaThumbnailProps) {
+export function MediaThumbnail({ src, alt, type, className = "w-full h-full object-cover", thumbnailUrl }: MediaThumbnailProps) {
   const [error, setError] = useState(false);
+  const [thumbnail, setThumbnail] = useState<string | null>(thumbnailUrl || null);
+  const [loading, setLoading] = useState(false);
+  const videoRef = useRef<HTMLVideoElement>(null);
+  const canvasRef = useRef<HTMLCanvasElement>(null);
   const isVideo = type === 'video' || isVideoUrl(src);
 
-  if (error || !src) {
+  // Generate thumbnail from video first frame
+  useEffect(() => {
+    if (!isVideo || thumbnail || error || !src) return;
+
+    const video = document.createElement('video');
+    video.crossOrigin = 'anonymous';
+    video.muted = true;
+    video.preload = 'metadata';
+
+    const handleLoadedData = () => {
+      // Seek to 1 second or 10% of duration (whichever is smaller)
+      const seekTime = Math.min(1, video.duration * 0.1);
+      video.currentTime = seekTime;
+    };
+
+    const handleSeeked = () => {
+      try {
+        const canvas = document.createElement('canvas');
+        canvas.width = video.videoWidth || 320;
+        canvas.height = video.videoHeight || 180;
+        const ctx = canvas.getContext('2d');
+        if (ctx) {
+          ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
+          const dataUrl = canvas.toDataURL('image/jpeg', 0.8);
+          setThumbnail(dataUrl);
+        }
+      } catch (e) {
+        console.warn('Failed to generate video thumbnail:', e);
+        setError(true);
+      }
+      video.remove();
+    };
+
+    const handleError = () => {
+      console.warn('Video thumbnail generation failed for:', src);
+      setError(true);
+      video.remove();
+    };
+
+    video.addEventListener('loadeddata', handleLoadedData);
+    video.addEventListener('seeked', handleSeeked);
+    video.addEventListener('error', handleError);
+
+    setLoading(true);
+    video.src = src;
+    video.load();
+
+    // Timeout fallback
+    const timeout = setTimeout(() => {
+      if (!thumbnail) {
+        setError(true);
+        video.remove();
+      }
+      setLoading(false);
+    }, 5000);
+
+    return () => {
+      clearTimeout(timeout);
+      video.removeEventListener('loadeddata', handleLoadedData);
+      video.removeEventListener('seeked', handleSeeked);
+      video.removeEventListener('error', handleError);
+      video.remove();
+    };
+  }, [src, isVideo, thumbnail, error]);
+
+  // Show placeholder if error or no src
+  if ((error && !thumbnail) || !src) {
     return (
       <div className={`flex items-center justify-center bg-muted ${className.replace('object-cover', '')}`}>
         {isVideo
@@ -33,18 +104,57 @@ export function MediaThumbnail({ src, alt, type, className = "w-full h-full obje
     );
   }
 
+  // Video with generated thumbnail
   if (isVideo) {
+    if (thumbnail) {
+      return (
+        <div className={`relative ${className.replace('object-cover', '')}`}>
+          <img
+            src={thumbnail}
+            alt={alt}
+            className={className}
+            onError={() => setError(true)}
+          />
+          <div className="absolute inset-0 flex items-center justify-center bg-black/20">
+            <div className="w-10 h-10 rounded-full bg-black/50 flex items-center justify-center">
+              <Play className="w-5 h-5 text-white fill-white ml-0.5" />
+            </div>
+          </div>
+        </div>
+      );
+    }
+
+    // Loading state while generating thumbnail
+    if (loading) {
+      return (
+        <div className={`flex items-center justify-center bg-muted animate-pulse ${className.replace('object-cover', '')}`}>
+          <VideoIcon className="w-8 h-8 text-muted-foreground" />
+        </div>
+      );
+    }
+
+    // Fallback to video element
     return (
-      <video
-        src={src}
-        className={className}
-        preload="metadata"
-        muted
-        onError={() => setError(true)}
-      />
+      <div className="relative">
+        <video
+          ref={videoRef}
+          src={src}
+          className={className}
+          preload="metadata"
+          muted
+          playsInline
+          onError={() => setError(true)}
+        />
+        <div className="absolute inset-0 flex items-center justify-center bg-black/20">
+          <div className="w-10 h-10 rounded-full bg-black/50 flex items-center justify-center">
+            <Play className="w-5 h-5 text-white fill-white ml-0.5" />
+          </div>
+        </div>
+      </div>
     );
   }
 
+  // Image
   return (
     <img
       src={src}
diff --git a/client/src/pages/mobile/remotion-video.tsx b/client/src/pages/mobile/remotion-video.tsx
index 84c6fab..c450b4a 100644
--- a/client/src/pages/mobile/remotion-video.tsx
+++ b/client/src/pages/mobile/remotion-video.tsx
@@ -6,7 +6,7 @@ import { Textarea } from "@/components/ui/textarea";
 import { Label } from "@/components/ui/label";
 import { Switch } from "@/components/ui/switch";
 import { Slider } from "@/components/ui/slider";
-import { UploadCloud, Video, Loader2, Menu, Check, Sparkles, Mic, Volume2, Music, Play, Pause, Send, Camera } from "lucide-react";
+import { UploadCloud, Video, Loader2, Menu, Check, Sparkles, Mic, Volume2, Music, Play, Pause, Send, Camera, ImagePlus } from "lucide-react";
 import { MediaThumbnail } from "@/components/media-thumbnail";
 import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet";
 import Sidebar from "@/components/sidebar";
@@ -51,6 +51,7 @@ export default function MobileRemotionVideoPage() {
   const [isPublishing, setIsPublishing] = useState(false);
   const audioRef = useRef<HTMLAudioElement>(null);
   const cameraInputRef = useRef<HTMLInputElement>(null);
+  const galleryInputRef = useRef<HTMLInputElement>(null);
   const { toast } = useToast();
 
   const { data: allMedia = [] } = useQuery<Media[]>({ queryKey: ['/api/media'] });
@@ -67,7 +68,23 @@ export default function MobileRemotionVideoPage() {
   });
 
   const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-    if (e.target.files) setImages(Array.from(e.target.files).slice(0, 4 - selectedLibraryImages.length));
+    if (e.target.files && e.target.files.length > 0) {
+      const filesArray = Array.from(e.target.files);
+      const remaining = 4 - selectedLibraryImages.length - images.length;
+
+      // Corriger les noms de fichiers pour les fichiers venant de la galerie mobile
+      const processedFiles = filesArray.slice(0, remaining).map(file => {
+        if (!file.name || file.name === 'blob' || file.name === '' || file.name === 'image') {
+          const ext = file.type.split('/')[1] || 'jpg';
+          return new File([file], `gallery-${Date.now()}-${Math.random().toString(36).substr(2, 9)}.${ext}`, { type: file.type });
+        }
+        return file;
+      });
+
+      setImages(prev => [...prev, ...processedFiles].slice(0, 4 - selectedLibraryImages.length));
+    }
+    // Reset input pour permettre de resélectionner les mêmes fichiers
+    e.target.value = '';
   };
 
   const handleCameraCapture = (e: React.ChangeEvent<HTMLInputElement>) => {
@@ -184,6 +201,7 @@ export default function MobileRemotionVideoPage() {
             <CardTitle className="text-base">1. Images</CardTitle>
           </CardHeader>
           <CardContent className="space-y-3">
+            {/* Input caché pour la caméra */}
             <input
               ref={cameraInputRef}
               type="file"
@@ -192,14 +210,26 @@ export default function MobileRemotionVideoPage() {
               onChange={handleCameraCapture}
               className="hidden"
             />
+            {/* Input caché pour la galerie - séparé pour meilleure compatibilité mobile */}
+            <input
+              ref={galleryInputRef}
+              type="file"
+              accept="image/*"
+              multiple
+              onChange={handleFileChange}
+              className="hidden"
+            />
             <div className="flex gap-2">
-              <div className="flex-1 border-2 border-dashed border-border rounded-lg p-4 flex flex-col items-center relative bg-muted/30">
-                <input type="file" multiple accept="image/*" onChange={handleFileChange}
-                  className="absolute inset-0 w-full h-full opacity-0 cursor-pointer" />
-                <UploadCloud className="h-6 w-6 text-muted-foreground mb-1" />
-                <p className="text-xs font-medium">Galerie</p>
-                <p className="text-xs text-muted-foreground">{images.length} choisie(s)</p>
-              </div>
+              <Button
+                variant="outline"
+                className="flex-1 h-auto py-4 px-4 flex flex-col items-center gap-1"
+                onClick={() => galleryInputRef.current?.click()}
+                disabled={totalSelected >= 4}
+              >
+                <ImagePlus className="h-6 w-6 text-primary" />
+                <span className="text-xs font-medium">Galerie</span>
+                <span className="text-[10px] text-muted-foreground">{images.length} choisie(s)</span>
+              </Button>
               <Button
                 variant="outline"
                 className="h-auto py-4 px-4 flex flex-col items-center gap-1"
diff --git a/server/routes/remotion.ts b/server/routes/remotion.ts
index eb0768d..2e8bc1e 100644
--- a/server/routes/remotion.ts
+++ b/server/routes/remotion.ts
@@ -2,6 +2,8 @@ import { Router } from "express";
 import multer from "multer";
 import path from "path";
 import fs from "fs";
+import { exec } from "child_process";
+import { promisify } from "util";
 import { bundle } from "@remotion/bundler";
 import { renderMedia, selectComposition } from "@remotion/renderer";
 import { ffmpegService } from "../services/ffmpeg";
@@ -10,6 +12,25 @@ import { minioService as cloudinaryService, buildMinioUrl } from "../services/mi
 import { facebookService } from "../services/facebook";
 import * as musicMetadata from "music-metadata";
 
+const execAsync = promisify(exec);
+
+/**
+ * Generate a thumbnail from a video file using FFmpeg
+ * @param videoPath Path to the video file
+ * @param outputPath Path to save the thumbnail
+ * @param seekTime Time in seconds to extract the frame (default: 1s)
+ */
+async function generateVideoThumbnail(videoPath: string, outputPath: string, seekTime: number = 1): Promise<boolean> {
+  try {
+    const cmd = `ffmpeg -y -ss ${seekTime} -i "${videoPath}" -vframes 1 -q:v 2 "${outputPath}"`;
+    await execAsync(cmd);
+    return fs.existsSync(outputPath);
+  } catch (error) {
+    console.warn('⚠️ Failed to generate video thumbnail:', error);
+    return false;
+  }
+}
+
 export const remotionRouter = Router();
 
 const uploadDir = path.join(process.cwd(), "uploads", "temp");
@@ -291,8 +312,21 @@ remotionRouter.post("/render", upload.fields([{ name: "images", maxCount: 4 }, {
     });
 
     console.log("✅ Render completed:", outputFilename);
+
+    // Generate thumbnail for the video
+    const thumbnailFilename = outputFilename.replace('.mp4', '-thumb.jpg');
+    const thumbnailPath = path.join(uploadDir, thumbnailFilename);
+    const thumbnailGenerated = await generateVideoThumbnail(outputLocation, thumbnailPath, 2);
+
+    if (thumbnailGenerated) {
+      console.log("🖼️ Thumbnail generated:", thumbnailFilename);
+    }
+
     // Return relative URL so any client (mobile, desktop, Docker) can access it
-    res.json({ url: `/uploads/temp/${outputFilename}` });
+    res.json({
+      url: `/uploads/temp/${outputFilename}`,
+      thumbnailUrl: thumbnailGenerated ? `/uploads/temp/${thumbnailFilename}` : null,
+    });
 
   } catch (err: any) {
     console.error("❌ Remotion render error:", err);