Dav1d 1.5.3 had been ported to ArcaOS and OS/2.
"dav1d is an AV1 cross-platform decoder, open-source, and focused on speed and correctness.It is now battle-tested and production-ready and can be used everywhere."
If you would like to support KO Myung-Hun you can make a donation at his website.
Port by: KO Myung-Hun