worldcat lists the institutions with this book https://search.worldcat.org/title/1048005393, you’ll probably have to show up in person. You may be able to do an inter-library loan if your local library doesn’t have the book, you could get it from a sister library. However, the only public library that lists having the book is the Austin Public library in Austin, Texas.
Right, only one side of the connection needs an open port (and most clients will let that be either seed or leech side)… this is why having an open port on your end is useful if you’re downloading, since you can download from seeders that don’t have an open port.
If you want the instances to sync, you just need to sync the directory. (I currently use nextcloud sync for this, but in the past I used synching and before that btsync)
If they dont try to modify the files at the same time (with sync delay) there won’t be any issues. If they do grow out of sync, you can fix pretty easily with db repair.
This uses ffmpeg under the hood and muxes the file into a .m4a file without transcoding. Basically keeping whatever compression youtube used for the audio (which is some sort of mpeg4 compatible audio, probably depends a little bit)
This still recompressed, but it’s the best you can do using youtube as the source.
I don’t think yt-dlp can crack DRM… most sites don’t bother using it.