add youtube behavior

Author: ikreymer

src/site/youtube.ts

@@ -0,0 +1,16 @@
+import { AutoScroll } from "../autoscroll";
+
+export class YoutubeBehavior extends AutoScroll {
+  override async awaitPageLoad(ctx: any) {
+    const { sleep, assertContentValid } = ctx.Lib;
+    await sleep(10);
+    assertContentValid(() => {
+      const video = document.querySelector("video");
+      const paused = video && video.paused;
+      if (paused) {
+        return false;
+      }
+      return document.documentElement.outerHTML.indexOf("not a bot") === -1;
+    }, "no_video_playing");
+  }
+}