The video covers how CP/Ms big problem was that the disk formats weren't the same between machines, doubly true for this Sony which used new 3.5" disks. So all the existing CP/M software had to be specifically re-released for this machine, which caused a chicken and egg problem (who is going to release software for a machine nobody is buying because there is no software for it)

The MS-DOS world solved the problem by everyone just cloning the IBM hardware down to the disk format.

This is, indeed, an issue. IIRC, the only interchangeable disk format with CP/M was with 8 inch media.

Unless the disks had copy protection, you could copy them over a serial link. I did that a lot between my Apple II and other CP/M machines.