[Asterisk-Users] video

[Altus Snyman]

Good day all
I'm interested in video on asterisk using SIP and windows clients
Now I did my research on http://www.voip-info.org/wiki-Asterisk+video
I have a few question:

*On the page they say you need the H.261 H.263? codecs,are these compiled in 
by default or do I need to do something special and if yes what?
*What windows clients are available?
*What cameras/hardware are the best?

Please advice and comment on this
Thanks
Altus