Yeah I tried to play videos and it don't work
First it depends on the type of phone you have,For example I have the samsung finesse,Just go into your metro broswer and if your phone is able to use html support visit www.youtube.com if your phone doesn't then its pretty safe to asume you cannot visit that site.
The metroPCS samsung freeform cannot play videos at all, I have on and tried every thing getting a 6Gb memory to hacking it and none of it works
You can watch videos from a variety of phones but only if you know how to some phones have a diffrent way of watching so only if you know how to get it on