Blender Foundation makes 3D (and increasingly capable of much more) creation software, and (with partners) makes open movies as a way of informing the direction of the software through hard experience. As shorts (all less than 15 minute duration) they miss an obvious criterion for being "premium" videos, but their pioneering role, renown, and quality make up for that. They have been shown in short film festivals, but in a Netflix-like service could be treated as a series.
All of these are available from the Blender Cloud along with assets used to make the movies, accompanying tutorials, and more, all under CC-BY, or the Blender Foundation YouTube channel, with embeds below. Links to best copies on Archive.org should be added as well.
The preferred way to contribute to further productions seems to be by subscribing to the Blender Cloud, which costs $10 or €10 a month.
Elephants Dream (2006)
Big Buck Bunny (2008)
Tears of Steel (2012)
Episode 1: Llama Drama (2013)
Episode 2: Gran Dillama (2013)
Episode 3: Llamigos (2016)
Cosmos Laundromat (2015)
Glass Half (2015)
Wires for Empathy (forthcoming)