have not found a CCO document describing the ports used for IPTV yet. if/when i do i will post.
for the most part, i find it very helpful to use a sniffer to determine what ports an application uses.
(many times the software engineers tell me one thing, when i call them, only to be lacking some info; so i use a sniffer to determine these myself anymore to save time and headache)
if you cannot find these, try to use the FREE sniffer from http://ethereal.com to verify exactly what ports are used for IPTV.