DUST is a YouTube channel featuring short science fiction films. They post a new film every Monday, Wednesday and Friday. Most are live action, some pure CGI, and there are a few animated films as well.
As you might expect, the quality of story (and the acting) is pretty variable across the many titles available, though the production values are fairly high across the board.
Some of my favorites (descriptions pulled straight from YouTube):
Final Offer A down-on-his-luck lawyer awakes in a doorless room to find he’s been selected to negotiate on behalf of the human race.
Hyperlight Two elite astronauts wake up in the abyss of space; they return to their stranded ship and discover the surprising reason behind their mission’s catastrophic failure.
Iteration 1 After waking up in a bizarre facility, Anna is forced to work together with her literal past lives in order to escape.
Wire Cutters A chance encounter proves fateful for 2 robots mining on a desolate planet.
King Ripple Four teens travel into a desolate and decrepit urban wasteland brought forth by the very being they wish to find, dead or alive.