MPV vs 1by1

When used with youtube-dl.

Everything MPV needs to play media files is contained within which means no outside codecs are needed.

Click to open files and get Video with sound (and passthrough of codecs like DTS etc) for a perfect cinema experience. Works okay for many files.

Default window is not much more than a title bar - and if you drag/resize the window it resizes the video and leaves no empty areas. There is no visible control or display unless you use mouse/keyboard over the window.
This is the best player to use unless you're going for a media center (then use MPV based Plex Media Player to display and play the Plex Server library).

Always up to date, rapid development.

Intelligently caches livestreams and enables jumping within the cached stream.

Gapless play, transition overlapping, audio enhancer, cue sheet support, playlist support, favorites, theme presets, global hotkeys, and more.

Very small size, low resource usage, and portable.

Remembers last track and position.

You can select presets or customize the whole listening experience.

Gapless play is supported. You can add transitions so that the last ten seconds melt into the first of the next song. There is an intro scan where you can fastly find a certain song. When you drag the wheel to the maximum, the loudness is better than with other players.

You can adjust every single color. And adjust everything else.

You can change everything, including shortcuts that also work in other apps.