diff --git a/packages/backend/src/server/FileServerService.ts b/packages/backend/src/server/FileServerService.ts
index e82ef64dc4..714dddb162 100644
--- a/packages/backend/src/server/FileServerService.ts
+++ b/packages/backend/src/server/FileServerService.ts
@@ -81,6 +81,13 @@ export class FileServerService {
 				.catch(err => this.errorHandler(request, reply, err));
 		});
 
+		fastify.get<{
+			Querystring: { url: string; };
+		}>('/proxy/thumbnail.webp', async (request, reply) => {
+			return await this.videoThumbnailHandler(request, reply)
+				.catch(err => this.errorHandler(request, reply, err));
+		});
+
 		fastify.get<{
 			Params: { url: string; };
 			Querystring: { url?: string; };
@@ -371,6 +378,51 @@ export class FileServerService {
 		}
 	}
 
+	@bindThis
+	private async videoThumbnailHandler(request: FastifyRequest<{ Querystring: { url: string; }; }>, reply: FastifyReply) {
+		const file = await this.getStreamAndTypeFromUrl(request.query.url);
+
+		if (file === '404') {
+			reply.code(404);
+			reply.header('Cache-Control', 'max-age=86400');
+			return reply.sendFile('/dummy.png', assets); // TODO: return webp
+		}
+
+		if (file === '204') {
+			reply.code(204);
+			reply.header('Cache-Control', 'max-age=86400');
+			return;
+		}
+
+		if (file.file?.thumbnailUrl) {
+			return await reply.redirect(301, file.file.thumbnailUrl);
+		}
+
+		if (!file.mime.startsWith('video/')) {
+			if ('cleanup' in file) {
+				file.cleanup();
+			}
+
+			reply.code(400);
+			return;
+		}
+
+		try {
+			const image = await this.videoProcessingService.generateVideoThumbnail(file.path);
+
+			if ('cleanup' in file) {
+				file.cleanup();
+			}
+
+			reply.header('Content-Type', image.type);
+			reply.header('Cache-Control', 'max-age=31536000, immutable');
+			return image.data;
+		} catch (e) {
+			if ('cleanup' in file) file.cleanup();
+			throw e;
+		}
+	}
+
 	@bindThis
 	private async getStreamAndTypeFromUrl(url: string): Promise<
 		{ state: 'remote'; fileRole?: 'thumbnail' | 'webpublic' | 'original'; file?: MiDriveFile; mime: string; ext: string | null; path: string; cleanup: () => void; filename: string; }