Yume

This is a compilation of Avante-Garde shorts that are unique, mind-blowing and addicting. These will give you a different POV on the world of animation.
Includes short films, short series, commercials, station IDs, and specials.

Part 1: https://myanimelist.net/stacks/23559
Part 2: https://myanimelist.net/stacks/23560
Part 3: https://myanimelist.net/stacks/23563
Part 4: https://myanimelist.net/stacks/23564
Part 5: https://myanimelist.net/stacks/23566
Part 6: https://myanimelist.net/stacks/23567
Part 7: https://myanimelist.net/stacks/23568
Part 8: https://myanimelist.net/stacks/23569
Part 9: https://myanimelist.net/stacks/23571
Part 10: https://myanimelist.net/stacks/23573
Part 11: https://myanimelist.net/stacks/23575

DigiCon6 ASIA Awards is a competition for short films of Asian origin, established in the year 2000 by TBS.

Most of the winning entries from recent years can be viewed for free on the official website and youtube channel:

https://www.tbs.co.jp/digicon

There is an English version of the website as well, but it doesn't list all the Japanese regional winners. Instead, unlike the Japanese version, it does have winners from other regions:

https://www.tbs.co.jp/digicon/en

This list is by no means comprehensive, as many of the winners don't have a MAL entry yet, presumably because the creators might not be established in the industry.

Part 2: https://myanimelist.net/stacks/51870