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

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

http://popcorntime.ag/
https://popcorn-time.se/
https://yts.ag/
http://butterproject.org/

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Another way that is said to work is "Kodi" player with addon called "1Channel":
http://www.iwillfolo.com/install-1channel-kodi-xbmc-addon-watch-movies-tv-shows-instantly/
http://addons.tvaddons.ag/show/plugin.video.1channel/
https://seo-michael.co.uk/how-to-manually-install-1channel-add-on-xbmc/

1Channel may use http://www.primewire.ag/ movie database.

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

https://github.com/steeve/plugin.video.pulsar