ad 1) I have hack... that always worked, so far.
If your video file is too big to upload it thru SPPB media, for example, it has 10-25-50 MB:
- Create/Use a small video file 500KB (max 1MB) with orginal filename.
- Upload it using SPPB Media !
- Then using FTP tool or File Manager (cPanel) upload orginal (big) video file on that same location (path) that you have small dummy video. Yes, override that small file.
- After all SPPB should be able to see that file in browser
Alternative idea:
You can always remember path to video file and manually put it in URL field. Even with https + domain name if classic path would not work.
I've spent over an hour trying different solutions.
Sometimes you have to think out the box. How to cheat the system. Not follow the rabbit.