IINA is based on MPV, so I would assume that with a custom OSC, mpv can also look like this.

edit: went looking https://github.com/maoiscat/mpv-dark-box is definitely not what youre looking for, but an example. It might be possible to modify this to have a blurred background instead of a black background.

https://github.com/stax76/awesome-mpv has a bunch of info about customizing mpv, with a On Screen Controller section.

Imagine having a router with an AP built in. We don’t use that consumer tier stuff around here. 😎