There is a new pull request by lugubris against master on the void-packages repository

https://github.com/lugubris/void-packages python3-mpv
https://github.com/void-linux/void-packages/pull/14384

python3-mpv: fix license issue, adopt
vlicense should be used for AGPL licenses

A patch file from https://github.com/void-linux/void-packages/pull/14384.patch is attached