macOS: Allow smaller playback window

It would be great if we could resize the playback window and make it smaller than we currently can. PIP doesn’t always work great and doesn’t support subtitles, and when working with short episodes you need to go in and out of PIP every episode. An example that does support smaller playback windows on macOS is IINA.

It is resizable. Click drag from a corner works for me.

Not to less than the width of the playback bar, which is still 40% of the width of a 13" MacBook