Is it possible to stream almost any movie online without need to fully download it before starting playing?


There appears to be software that allows streaming movies using torrent. Its called Popcorn Time:


Another way that is said to work is "Kodi" player with addon called "1Channel":

1Channel may use movie database.

Another way is the Kodi addon called "Pulsar", it allows streaming media out of torrents across many torrent trackers.