Watching tv channels over net?

Is it possible to watch TV channels over internet and how?
I know that there are applications that can display TV program, but how that works in practice? How do I find channels, what do I need to display them?

This may be a stupid question, but for one that never used computer to watch anything except a few clips on youtube, it is not.

P.S. I am having serious problem with cable TV services provider as they are cutting off some channels, adding new, and overcharging, and I am seriously looking for some alternative.

Most tv is available online. For me in the UK eg: bbc.co.uk, ITV, CH4 etc…
Via flash
get_iplayer can download stuff too.

There are places that do feature online tv like veoh: Free Videos Online - Watch TV Online - Free Video Clips | Veoh
But not sure it’s Linux friendly.

Imagine… I put BBC in search dialog and I got a message:

Veoh is no longer available in BRAZIL. If you are not in BRAZIL or think you have received this message in error, please go to veoh.com and report the issue.

Just google around

eg: http://www.ovguide.com/
http://www.nosubscriptionrequired.net/
http://www.onlinecinema.org/
http://www.findinternettv.com/

I don’t know about TV channels.

Its quite common for news from various web sites to be streamed. For example, my French language course homework, includes every night watching a bit of French language news from France 2 : site de la chaîne de télévision - France 2 … on the right side of that page (upper part) one can click on “8h” or “13h” or “20h” or “Le flash” .

This is streamed as mms. If I wish to copy it to my hard drive for later viewing, I typically capture the mms address, and use GMiMMS to save the file to my PC.

Understood. Thanks!
I found some sites that has some channels. Mostly in bad resolution, but watchible.

Which program is good to be used for watching selected channels from varuous sources? Miro? Kaffeine? MPlayer?

Thanks

I would expect most to be Flash based. If other eg; media player use vlc or mplayer plugin from packman.

OK, thanks for info