YouTube videos hang at 1080p and 60fps?

No laptop that used to play videos in 1080p and 60fps runs jz not so liquid even if I only have a 1368x768 hd screen, I've seen the clearer improvement from 720p to 1080p have one
A8-6410 with R5 graphics have the latest drivers drinne also have hardware acceleration and other browser uses Flash Player Geupdatet

This is probably due to the bad internet connection.

Have a 150k line and the video already loads right in front of this gray balkan runs directly

From 720 to 1080 there's also an improvement in contrast to 30 / 60fps