Movies could be watched on TV for decades... pretty much all the way back to when TV was invented. Movies could be watched on VHS for a long time (I can't remember when we first used VHS, but it was in the 80s). Movies could be watched on things like 8mm at home long before that. You could definitely watch movies in places other than the theatre (cinema) prior to 1990.
DVD? Ok, so it is a new format. Not a new place to watch a movie. VCD? That's just a computer video format, basically. No different from saying you can watch AVI or MPG. Again, it's just a format and not a new place to watch a movie.
There are DLLs that allow use of webcam within mIRC. Use them rather than requesting that mIRC become bloated with a lot of stuff that isn't really all that useful. People who want it can use a DLL for it very easily. Sure, using it means that others need the DLL. But, if people REALLY want to use it, they can get the DLL for it. If they're too lazy to do so, they can't complain about not having webcam support.
As for saying "go use IM"... why not? Most people who use mIRC have IM running at the same time anyhow.
Darwin, I'd not say that DVD format in a theatre (cinema) would improve the experience. I prefer the reel format. Seeing the flickers and "artifacts" in the movie are part of the experience, imo. If I want to watch a DVD, I'll do so at home.
