I had the idea to replace my desktop computer with the hardware similar to that found in a mobile phone for a long time now. I think this is important because the Internet is a part of every day life and you should be able to buy cheap computers. What I can say is that I really like this little quad core computer. Youtube will work depending on the browser. In Epiphany I got a working html5 player. The best part is that it worked wonders with my little external USB Xonar U3 sound card. With mplayer * and ALSA the sound in the headphones sounded very good. I would not take a chance in buying an expensive sound card for the raspberry pi 2 at this time but if you have one extra it will be worth testing.