Can't view certain videos online anymore

Hello, When I purchased my new gaming computer it worked without flaw until 2 months later when suddenly I wasn't able to see certain videos online anymore! I watch TV shows mostly on this website:

http://www.free-tv-video-online.me/

Usually House, Walking Dead, Dexter, etc.

I want to make it clear that Youtube works perfectly just not any of the videos on some websites. I've asked many of my friends for help, scoured the internet for an answer, and tried many things to try and fix this but no dice. I really could use some help here.