mpv

You want a fast player that plays everything and is deeply customizable, without a bloated interface. mpv is ultra-minimal: a free, open-source minimalist cross-platform video player, play nearly all audio and video formats, with a tiny footprint and smooth playback, deeply customizable via config files and scripts, a favorite of geeks and power users. Cross-platform, open source.

Features

Broad formats: Play nearly all audio/video formats.

Minimalist: Clean, fast, low footprint.

Highly configurable: Customize via config and scripts.

Open and free: Cross-platform, open source, free.