Opera mobile 22 on Android 4.4
Opening threads on talk is starting a short video showing clouds. It's totally bizarre. Just started this morning. Sometimes it doesn't open, other times it does. Just visiting the "active" list is enough to start it, but not every time.
It's definitely Opera playing the video, and not another app because a "video playing" notification appears in the notification area from opera.
If I hit the "stop loading" X early ish after page load, the video doesn't start playing.
The video will also start playing if I lose threads into other tabs.