ENVIRONMENT and STATS
For syncing clients:
I have been using Youtube for a long time,Recently i saw a problem while playing a youtube video,some times i pause the video in normal scrren and then if i go the full screen ,the video automatically plays without me being playing it
REPRO STEPS
1.open an youtube video,pause the video in normal screen size
2.Then make it to full screen .
3.You can see sometimes that the video starts playing automatically.
ACTUAL RESULTS
Video plays from pause mode without even starting
EXPECTED RESULTS
video should remain in pause mode when switching from normal screen to full screen 
ADDITIONAL INFO
Anything else which may help us debug the issue; screenshots of error
messages or states are always helpful.