My case is that I’ve got a live Zoom gathering on Sunday mornings, where I combine live interaction with playing .MOV files that provide content. I use Zoom screen sharing for it.
QuickTime Player is abysmal for this task. I want 7 files available and ready to go. QT Player doesn’t seem to have a playlist function (or if it does, it’s one of those wretched “we put it in there and we hope you somehow find it in the interface” deals), so on my secondary monitor I have seven black rectangles with no title bar stacked like Darth Vader’s playing cards. Yesterday was the first time I’d done this in Catalina (new iMac, moved from High Sierra) and I swear it was worse.
So I spent yesterday afternoon looking for a replacement, and came across Elmedia Player. Free for most functions that don’t involve editing or timeline manipulation.
It produces a playlist that can be separated into a new window, and can be set to play individual selections and then pause. The playlists can be saved (unfortunately with the same extension that Music uses). I can set up my share to a single player window instead of the previous workflow where (in Zoom) I had to select the individual player window, then in QT use the Window menu to select that window again before I could start playing the video I wanted.
It seems pretty straightforward (VLC would have been another choice, but sometimes it feels like it belongs on my workbench instead of my presentation stage).