I write (nearly) all my arrangements myself (300something on YT right now), but I never tab them down (way too much work, in that time I can arrange and record 2 new songs!)
You're crazy. How do you remember everything? If I find myself a nice chord progression and strumming pattern and don't write it down, it's gone in 60 seconds. I'll just have to stare at you're video to learn it. It was really nicely done.
Simple: I don't.
After a few days I can't play these songs anymore.
If I want to play them again I take my own videos and check what I played, and usually I can play it again within a few minutes.
But at least half of the songs on YouTube I practised and arranged for a day or up to a week, recorded it and never played it again.