Firefox not playing videos

Generally I save videos to watch them but some sites insist on watching videos in a webpage. For some reason my firefox can't play them. It says its missing a plugin. When I click to download it it says it can't find one. So what plugin am I missing? It wont play any media in a window I don't think. I am using media player classic and real alternatives for quicktime and real.

>>16
don't be a fucktard

IE and Opera save everything to the hard disk in temporary folders. This is awesome for low-end machines that don't have enough ram or fast enough ram, and a waste of resauces on a modern system.

Firefox is memory-intensive but doesn't write shit to the hard disk. Everything it loads resides in RAM unless you choose to save it. It's faster on a fast system, and practically unuseable on a low-end system.

Use the right tool for the right job. If you're using Firefox on your 486 you're driving a nail with a circular saw.