Can't play any video online
It looks like hwcomposer module hangs up. It's internal part of Android, so you should search for newer ROM. XDA Forums are great place for it.

It's common in Cyanogenmod by the way. When CM12 came out for Galaxy S3, it was impossible to play video outside YouTube app.

Another solution is disabling H/W rendering in every app. It depends on the application, but you can do this in for example MX Player and maybe even Chrome (#disable-webrtc-hw-decoding from chrome://flags)