fix: convert Web ReadableStream to Node.js stream for YouTube upload

googleapis expects a Node.js Readable stream with .pipe(), but
fetch().body returns a Web ReadableStream. Convert via Buffer +
Readable.from() to fix 'b.body.pipe is not a function' error.

Author: Miriad

lib/youtube-upload.ts

@@ -1,4 +1,5 @@
 import { google } from "googleapis";
+import { Readable } from "node:stream";
 
 const oauth2Client = new google.auth.OAuth2(
 	process.env.YOUTUBE_CLIENT_ID,
@@ -27,6 +28,11 @@ export async function uploadVideo(opts: UploadOptions): Promise<{ videoId: strin
 	const response = await fetch(opts.videoUrl);
 	if (!response.ok) throw new Error(`Failed to fetch video: ${response.statusText}`);
 
+	// Convert Web ReadableStream to Node.js Readable stream
+	// googleapis expects a Node.js stream with .pipe(), not a Web ReadableStream
+	const buffer = Buffer.from(await response.arrayBuffer());
+	const nodeStream = Readable.from(buffer);
+
 	const res = await youtube.videos.insert({
 		part: ["snippet", "status"],
 		requestBody: {
@@ -43,7 +49,7 @@ export async function uploadVideo(opts: UploadOptions): Promise<{ videoId: strin
 			},
 		},
 		media: {
-			body: response.body as unknown as NodeJS.ReadableStream,
+			body: nodeStream,
 		},
 	});