Thanks for clarifying, as well as listing which definition you used too, that definitely helped me.
Having never had any sight myself, I can unfortunately confirm that short of using Windows MovieMaker (a long deprecated piece of software) or trying to get through an overly steep learning curve of Reaper as a video editor (i.e. not its intended function really), on Windows in terms of screen reader accessible editing, you're out of luck.
I bought a Mac Mini for this reason last year and, whilst again its a learning curve, I've managed to edit videos like
this together without sighted assistance (other than for the very rare case where my project starts out incorrectly formatted without me realising which is on me). I know this has no background music, but I'm looking into learning how to make that work viably in post as well. I use Final Cut for all my editing and put together
this editing tutorial to show how things work.
I hope that helps and sorry I couldn't be the bringer of better news.