Hello,
I just noticed that in the rpi4 version of the 10.0 nightly build, I'm unable to play back .STRM files that contain links to video streams. This was working in the 9.2.x rpi4 builds. I also noticed that in the Windows version of Kodi 19, these play back successfully. So I'm assuming that either something is missing in the rpi4 10.0 nightly build, or some setting needs to be changed in it, or both.