If you have trouble with that on your current phone, try https://play.google.com/store/apps/details?id=is.xyz.mpv https://play.google.com/store/apps/details?id=

If you have trouble with that on your current phone, try https://play.google.com/store/apps/details?id=is.xyz.mpv https://play.google.com/store/apps/details?id=is.xyz.mpv which is the Android port of mpv, successor to mplayer/mplayer2 and what I use on every one of my machines to play smooth full-screen video from youtube and everywhere else.