Actually good avant-garde shorts (or tolerable, at least)
Anime
No crap like Sayuri or flashing "dEeP" trash like Aki no Puzzle. Here you got what you've come for: nonsense, but the GOOD kind of nonsense. Detach your brain and enjoy. Most of it is rated PG-13 or lower so don't worry about getting stuff you shouldn't see in your eyes.
Requisites for addition:
Must be 45 minutes or less.
Must have avant-garde genre tag.
I must have rated it 7 or higher. Not compulsory though, if a short has the other requirements it might be here despite the rating I gave.
Flashing lights must be kept to a minimum.
Little to no explicit sexual content. Nudity is allowed only if it's not in a sexual context.
Little to no screamers nor sudden volume changes or ear-screeching sounds.
Of course I must have watched it entirely.
Side note: F for my sanity in making this stack, I have been watching some horrible stuff among the few enjoyable ones. Good grief.
Requisites for addition:
Must be 45 minutes or less.
Must have avant-garde genre tag.
I must have rated it 7 or higher. Not compulsory though, if a short has the other requirements it might be here despite the rating I gave.
Flashing lights must be kept to a minimum.
Little to no explicit sexual content. Nudity is allowed only if it's not in a sexual context.
Little to no screamers nor sudden volume changes or ear-screeching sounds.
Of course I must have watched it entirely.
Side note: F for my sanity in making this stack, I have been watching some horrible stuff among the few enjoyable ones. Good grief.

ONA, 2020,
1 ep
Me:-
Author:8
These three years were worth it.
RATED PG-13 (I would rate it PG at most tho but you know how wack is this site.)
CW: Frightening scenes
RATED PG-13 (I would rate it PG at most tho but you know how wack is this site.)
CW: Frightening scenes
Mitsuami no Kamisama
Pigtails

Movie, 2015,
1 ep
Me:-
Author:8
The plot is quite vague, so your interpretation on what this short is could vary a lot. Still an interesting and creative short.
CW: Sensitive and controversial topics.
CW: Sensitive and controversial topics.
Nekojiru-sou
Cat Soup

OVA, 2001,
1 ep
Me:-
Author:9
I felt such a variety of feelings with this. Overall it was an excellent watch.
RATED PG-13, but there's a bit of explicit gore and brief nudity so I'd rate it R+
CW: Gore, mild explicit nudity.
RATED PG-13, but there's a bit of explicit gore and brief nudity so I'd rate it R+
CW: Gore, mild explicit nudity.

Movie, 2013,
1 ep
Me:-
Author:8
A nice story about a terminally ill person and a nurse. I really like how they expressed the feelings of both through the animation.
CW: Disturbing imagery
CW: Disturbing imagery

Movie, 1996,
1 ep
Me:-
Author:7
A 3D experimental short from 1996 with steampunk aesthetics.
RATED G
RATED G

CM, 2022,
1 ep
Me:-
Author:8
AC-NES AC-AC-NES AC-NES AC-AC-NESU
AC-NES AC-AC-NES AC-NES AC-AC-NESU
ACNES-ACNES-ACNES-ACNES
RATED G
CW: Fast-switching images.
AC-NES AC-AC-NES AC-NES AC-AC-NESU
ACNES-ACNES-ACNES-ACNES
RATED G
CW: Fast-switching images.

Movie, 2014,
1 ep
Me:-
Author:6
No need to overthink, the animation is fantastic. I want some of what he's drinking.
RATED G
RATED G

Music, 2022,
1 ep
Me:-
Author:8
I felt nostalgic by this one. 2000s graphics will be missed.
RATED G
RATED G
Yoru no Uta
Song of the Night

Music, 2023,
1 ep
Me:-
Author:9
Yoru intensifies.
The style reminded me of Night in the Woods.
RATED G
CW: Disturbing imagery.
The style reminded me of Night in the Woods.
RATED G
CW: Disturbing imagery.
?/Sankaku no Rhythm/Trump no Arasoi
?/Rhythmic Triangles/Fighting Cards

Movie, 1932,
1 ep
Me:-
Author:5
It's a silent experimental animation from 1932. As simple as that. Nothing much to say.
RATED G.
RATED G.
Toki no Kousa
Shibuya Vernacular

Special, 2018,
1 ep
Me:-
Author:9
Great concept, great execution.
RATED G.
RATED G.

Movie, 2017,
1 ep
Me:-
Author:8
The animation here is incredible I must say. So fluid, vivid and vibrant.
Also a really relatable story
CW: Gross-out imagery
Also a really relatable story
CW: Gross-out imagery

Movie, 1999,
1 ep
Me:-
Author:7
This one is notably subjective but I love the aesthetic of this short.
CW: Mild sexual images.
CW: Mild sexual images.

Movie, 2011,
1 ep
Me:-
Author:7
Similar to ? but with music! AND CUBES!
Also one of the VERY FEW avant-garde shorts that is a sequel.
RATED G.
Also one of the VERY FEW avant-garde shorts that is a sequel.
RATED G.

Music, 2010,
1 ep
Me:-
Author:7
If you wanted to watch Yojouhan Shinwa Taikei's ED, there's a full version of it!
Rated G
Rated G

Music, 2017,
1 ep
Me:-
Author:8
Game of Life simulation. I'd recommend reading the official page too, it's an interesting article on the story of the song.
RATED G
RATED G

Special, 1989,
3 eps
Me:-
Author:7
Graphics are stunning for 1989 standards. Recommended if you like early CGI animation.
RATED G
RATED G

Music, 2021,
1 ep
Me:-
Author:7
Might not be everyone's taste to see a videoclip like this.
RATED G (Maybe PG bc alcohol)
RATED G (Maybe PG bc alcohol)

ONA, 2007,
1 ep
Me:-
Author:6
An animation test, nothing much to say from my part.
RATED G.
RATED G.
Iro wo Kuu Akuma
The Color Eater

ONA, 2015,
1 ep
Me:-
Author:7
A cute monster decides to eat all the colors in the world but ends up puking them.
RATED G.
RATED G.