So I did find a solution to this. I didn't update the question with an answer because fuck Stack Overflow. Now I just have two remaining issues.

1. I can't send mouse clicks to the on-screen-controls in MPV. I'm not sure if this is even possible. I haven't gotten any responses in #mpv on IRC. I opened an SO question, but doubt anyone will look at it seriously: https://stackoverflow.com/questions/79697620/is-it-possible-to-send-mouse-events-clicks-to-the-on-screen-controls-osc-in-an
2. Fullscreening the QOpenGLWidget that's rendering the mpv video gives me a black screen. I can use other Python/Qt OpenGL examples and they fullscreen fine, so something weird is going on with the GL rendering context for MPV. I have so little 3D background I don't know where to start with this. I might have to break down and start using Microsoft™ Github again, because that's the only place where OSS like mpv and python-mpv have any support forums.

It's amazing how much I miss stats a la MPlayer in my video output overlay

How cool simple and smooth my playback arsenal has become

#Android #music #player #mPlayer #musicolet #VLC #lean #MPV #minimalist #OpenSource #POSIX

@rl_dane
@joel

FOSS NEWS

Proton Drive and Docs get support for collaboration with users without Proton account:
https://proton.me/blog/improve-productivity-collaboration-proton-drive

Organic Maps migrates repos to their own Forgejo instance, because they got blocked by GitHub, because a dev was temporarily geolocated in a US-sanctioned region:
https://alternativeto.net/news/2025/3/organic-maps-migrates-to-forgejo-due-to-github-account-blocked-by-microsoft/
(Why does GitHub have to know the geolocation of their users in the first place? But at least the Organic Maps project has the capacity to self-host, they successfully took control into their own hands.)

ReactOS 0.4.15 released with kernel improvements, improved hardware support, support for additional audio formats, multiple output channels etc:
https://alternativeto.net/news/2025/3/reactos-the-open-source-windows-compatible-os-just-shipped-its-biggest-release-to-date/

MPV 0.40 released with native HDR support on Linux, Wayland color management protocol support, new script for video alignment and zooming, new selection menu when right-clicking common buttons etc:
https://9to5linux.com/mpv-0-40-open-source-video-player-released-with-native-hdr-support-on-linux

Shotcut 25.03 released with ‘Text style’ preset to the ‘Generate Text on Timeline’ function in Subtitles, ‘Copy Current’ and ‘Copy All’ options to Filters, vertical and horizontal parameters to the No Sync video filter, a ‘Toggle Filter Overlay’ option to the Player menu etc:
https://9to5linux.com/shotcut-25-03-open-source-video-editor-released-with-various-new-features

Ente Photos v1 released with encrypted data stored in three separate clouds, in three different locations; on-device search capabilities for people and objects in photos, ability to automatically highlight past special moments and important people, with a widget option to relive these memories directly from the home screen etc:
https://alternativeto.net/news/2025/3/ente-has-finally-released-the-v1-of-its-end-to-end-encrypted-photo-video-cloud-storage-app/

XZ Utils 5.8 released with performance boost for the liblzma compression library; new --no-sync option; xz, xzdec, and lzmainfo components updated to replace non-printable characters with question marks when printing messages (to prevent malicious filenames from sending escape sequences to a terminal) etc:
https://9to5linux.com/xz-utils-5-8-introduces-performance-improvements-in-the-lzma-lzma2-decoder

(Linux news in original post)

2/of course curiosity took the better of me so I checked what the heck was #IINA (didn't remember installing it) and it turned out it's an awesome media player based on #mpv ( iina.io, github.com/iina/iina) which I was checking ages ago and forgot about it… this time around I played a bit more…