You might be able to stream over BitTorrent with one good seeder. It doesn't take many connections to saturate that seeder's upstream capability. Once a torrent's total seed upstream capacity is exceeded clients' playback will stall until they can buffer enough video to restart playback.

It takes a lot of upstream bandwidth to stream even just passable quality video. Between shitty upstream bandwidth for residential Internet and swarm participants limiting their seed ratios or further limiting upstream bandwidth scaling torrent streaming is unreliable at best and impractical at worst.