Flo
In early development, YouBit actually had this. During one of the many re-writes I omitted the feature to focus on other challenges within the project. It should be pretty easy...
Adding support for the `dav1d` codec might be trivial or not so much depending on the GOP structure. Might look into this sometime.
Yes, a progressbar would definitely be a nice addition. I'd approve a PR for it, but it won't be easy, there's no single loop you can use to report progress...