This is what I believe happened to me. I had over 3k videos and there was a lot to work with in that regard. Even though YouTube has a 3 month clause for copyright strikes, that doesn’t matter if the trolls know how to properly trip the system into believing that you suddenly started posting back to back copyrighted materials.
All the trolls had to do was find 3 questionable videos out of the 3000 and also over a 4 year course of time and then file copyright complaints all within a week. There was no due course of time with the 3 month grace period, the website simply has to end the channel.
There is no reason or logic built into the system. That is something that needs to be argued in a courtroom in front of a judge instead.