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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
If you can read code, then your deepest explanation is here: https://github.com/yt-dlp/yt-dlp
Players like VLC do much better and let you make your own arbitrary adjustments via GLSL :)
In particular, I like the anime4k shader pack, which is ML-based but runs in real time in mpv (and I think VLC as well). While it is tuned for anime (as is obvious from the name), it has decent denoise and deblur which often make YT content more watchable and a restore step that does a really good job with compression artifacts but is a bit too tuned for anime so may not always work, or even make things worse. See https://github.com/bloc97/Anime4K/releases
it's a simple script, should be portable to firefox with minor modifications. The source code is available on Github [0].
0: https://github.com/Andrews54757/Anti-Anti-Debug