Crazy idea, but if you can’t get the bandwidth to support a media server like Jellyfin or Emby where you live, what about placing a server at a trusted relatives or friends house that does have access to high bandwidth? You might need/want to help offset a better internet plan for them though. You could then setup a VPN connection to be able to manage the server remotely and sync files and media to it. You could even use it for off site backup.
When I start a personal project I create a readme file that has a ToDo section and a Change Log section. Anything I think of that I might want to do I put under ToDo, break it into small chunks and prioritize it. When a task is completed under the ToDo section, I move it to the Change Log section. Easy to maintain, track progress, and documents both a Road Map and Changes all in one place. It also has a section for references to shared assets that need attribution. Actually to keep it simple the same document usually also has an about section, an installation section, and a usage section.
If I had to speculate and GUESS, based on information I know now and if I give the CTO the benefit of the doubt and assume he was competent (contrary to what I saw), I would say they were having trouble canceling the contract with the third party consulting firm we were hired through. I also think they might have been quietly moving their operations out of state to another infrastructure originally belonging to another company they bought or merged with that had their own IT team and wanted us kept out of the loop. Hiring us might have been a way to reduce our compensation and get us under an NDA regarding the move. When hiring us failed they were able to re-negotiate the terms of the contract with the consulting firm for half of what it was. Again, just a guess.