Im on google chrome and i can't fast forward any you tube videos. In the other browser its fine but not on chrome

Is anyone having any problems because i can't fast forward videos and some of the screens are black

Have you tried reinstalling Chrome?

I'm having problems with it as well using IE11

A lot of videos just won't play and when I get one to play there is no bar across the bottom to slide along or pause, mute etc

the slide bar across the bottom of the video has come back now........

Are all the problems on the same device as i've been on youtube quite a bit today on different devices with no problems at all