This style of looping animation reminds me strongly of a short video I saw many years ago. It’s set to a song and features similar animated looping and morphing characters representing different stages of life, growing up, falling in love, etc. Black, white, yellows and reds. I can’t seem to find it now but I believe it had a creator with a german-sounding name. I may be hallucinating the memory, but I think the animation was titled “Love and Loss”, though I don’t see it anywhere online. Anyone know the one?
The only thing I know that is similar to this doesn’t quite fit your description.
Blockhead - The Music Scene https://youtu.be/NhheiPTdZCw
Or possibly Zodiac Shit by Flying Lotus https://youtu.be/0ScYz9sNaQk
The morphing does look similar. It had short looping animations that start childish and cartoony, then would slowly progress and become more scary and adult themed, representing the journey from birth to adulthood.
Hmm, sorry these are all I know. Maybe try searching for “psychedelic music video”. If you’re lucky you might find it this way.