I am planning to buy a home theater system with blueray player and wifi. My target is to be able to watch netflix, youtube, and other internet content via this device. I have a few questions to which I need answers.

Do all wifi devices play internet content? I must get YouTube but I found out that it is blocked on devices like Roku. I have seen Samsung players on internet with "YouTube" access. Does it mean other players don't provide access? I have a Sony Bravia TV and would prefer buying an adaptable device. Any suggestions?