Torrent magnet urls are cool, but you can’t tweet them.
Well, now you can. Here’s an example tweetable magnet link.
You can use that page to tweet about other torrents you think would interest your friends (paste a magnet link, or try the search box).
If there’s a bunch of torrents you want to recommend on a regular basis (for example, your own videos) you can become a Demagnetizr patron by customizing a single html page and uploading it somewhere (either an anonymous service like pastehtml.com, or your own site).
Update: Found a demagnetizr link inside a tumblr post. SRSLY.