MPV will play most media types (local or remote) and leverages GPU video decoding. There appear to be other applications that are building on top of it. When playing audio, the arrow keys can be used to move around in the file. MPV does not have a file browser, etc. you typically start from command line, or configure your file browser to use it.
Overall, seems like a nice low-friction way to quickly play media for those of us who spend most of our time in the terminal.