Vuze (Azureus) has a 'Media Server' plug-in which works very nicely, even with 1080p movies.
They intentionally bury it, though, because 'play now' is their premium offering (a shady business model imho). You have to go to the torrent's files, right click the .avi/.mkv/.mp4, go to 'Media server' -> 'Copy stream URI to clipboard', and then you can use that stream URI in any self-respecting player (VLC, mplayer).
That's terrible UX though :)
(Small note: in-order download is generally frowned upon in the torrent world, becaues it's bad for a torrent's health. However, Vuze manages this nicely by both prioritizing the pieces in order and still downloading/seeding random pieces at the same time. I think it's a very good compromise.)
They intentionally bury it, though, because 'play now' is their premium offering (a shady business model imho). You have to go to the torrent's files, right click the .avi/.mkv/.mp4, go to 'Media server' -> 'Copy stream URI to clipboard', and then you can use that stream URI in any self-respecting player (VLC, mplayer).
That's terrible UX though :)
(Small note: in-order download is generally frowned upon in the torrent world, becaues it's bad for a torrent's health. However, Vuze manages this nicely by both prioritizing the pieces in order and still downloading/seeding random pieces at the same time. I think it's a very good compromise.)