For me Booklore has better metadata management

If you don’t want to self host, they offer hosting.

You have two options:

1. Compress the video using something like Handbrake. It won’t look as good but you can give it a test pass to see what it looks like
2. Buy DVD 9 Double layer discs that will actually fit the contents

Suprise 3rd option: Split the ISO over multiple discs /s

Their unifi controller container is definitely one of the more popular ones.