This also happens to the S5. The video plays, but stops at a certain point in the video. Then you will have to press play again. Is there a setting that causes that to happen? Anybody has a resolution for this? Thanks.
I've had a quick look on the internet and there seems to be quite a few issues on android devices with this.
There's a general consensus that it's a buggy YouTube app. Try uninstalling any YouTube updates first, try that if not, I suggest you try the browser version to see if the same things happen.
Thanks, guys.. I think the Youtube app on my Note 4 is actually fine. My wife used my phone recently and she may have used the brower in watching the videos. Sorry for not verifying this myself first.
But i have to say that this issue is ongoing on the Samsung Galaxy S5.