www.youtube.com - see bug description

[webcompat-bot]

URL: https://www.youtube.com/watch?v=aSs6rHXSxIU
Browser / Version: Firefox Mobile 54.0
Operating System: Android 7.1.1
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Navigate to:
   any mobile YouTube video

Expected Behavior:
Video should play when you open a new tab or press home button.

Actual Behavior:
Video pauses after one second of being away.

From webcompat.com with ❤️

[adamopenweb]

This looks to be a duplicate of https://bugzilla.mozilla.org/show_bug.cgi?id=1355407.