No, because it has a “termination clause”, where if Watcom is suing you you can’t use the software anymore while you are

https://en.m.wikipedia.org/wiki/Sybase_Open_Watcom_Public_License

See the first bit, and the linked discussion by Debian developers.

I actually tried this right after I made this post, and it was not where near as smooth as I wanted. KDE would put the window that I had assigned to all desktops on top, whenever I would switch virtual desktops.

I found a solution though, it looks like mpv has support.