|You need to clarify what you downloaded. A torrent file is not a video. It's a file used by utorrent (& other Bittorrent clients) to suck in the video file from all the users that are seeding it. Torrent files are generally only a few KB in size. Video files (assuming it's a movie) can be anywhere from about 700MB to several GB, depending on how it was ripped.|
You should be getting your videos from a reliable torrent site such as isoHunt.com. And you should always read the reviews before wasting your time downloading a file. There are ways to fudge the seeder/leecher numbers & make a file look like it's a popular download, but if you see a file with say, 1000 seeders & no comments, you should be suspicious. The ratings are usually based on a 1-10 scale, & there's usually one for audio & one for video. If you see a 10/10 rating, it means both are excellent. You'll also see other comments such as - FAKE! If you take the time to do a little research before downloading, you should have no problems.
Anyhow, if you downloaded an actual video file, what format is it in? .AVI? .MPG? .MKV? And what happens when you try to play it? Which player are you using? If you use Windows Media Player & all you get is audio, your video codecs need updating. Or you can install VLC Media Player which will play just about anything you throw at it.