What should IINA do:

My problem is similar to #1852, but I want to use an iina-cli option to launch any kind of file (video or audio) in music mode.
I checked the file MPVOption.swift and the latest Nightly Build (2022-02-25 09:14:05 ab7a3bd), but the option does not exist.

What IINA is currently doing:

IINA does not start in music mode :)

Why do you think it should be added:

(1) Ticket #1852 made a PR, but was later reverted, but it's still not possible to just launch a music URL in music mode.
(2) Videos in music mode, nice to have.

(IINA is a godsend. Good job.)