... what a helpful reply..
anyhow, to answer your questions which i've interpreted as a 2 part question: how do you stream music / how do you watch videos?
To listen to music, all you really need is TCPMP or a similar media player capable of playing playlist files. Then you just browse to sites that serve up playlists like shoutcast.com,
http://www.thestreamcenter.com/pda/ , and i know i've read a few more sites on PPC, you may have to search around. I paid for Resco Radio because it aggregates the stations for you which is valuable to me.
To watch videos, IMHO - nothing beats YouTubePlay. You can do a quick search on an artist and just keep following "related links". Another way to do it is using the FLV bundle in conjunction with TCPMP to stream Youtube videos but that's not as streamlined as YTP.