[Regular (terrestrial) channels]
Channel 3
http://www.thaitv3.com/
Bangkok entertainment company limited
Channel 5
http://www.tv5.co.th/
Royal Thai Army Radio and Television
Channel 7
http://www.ch7.com/
Bangkok Broadcasting & Television Company Limited
Channel 9
http://www.mcot.net/tv/mod9
MCOT Public Company Limited
Thai PBS
http://www.thaipbs.or.th/
Thai Public Broadcasting Service
NBT
http://www.prd.go.th/
National Broadcasting Services of Thailand
[Cable channels]
(There are so many cable TVs in Thailand. Below are some of them which has web TV.)
Nation TV
http://www.nationtv.tv/
Nation Multimedia Group
MCOT World
http://www.mcot.net/mcotworld
Voice TV
http://www.voicetv.co.th/
Spring News
http://www.springnews.co.th/
TNN24
http://www.tnnthailand.com/