Working on some of the groundwork of it now in https://github.com/Owez/yark/pull/57. Higher quality might be a bigger issue to tackle because of dependence on ffmpeg but it'll be done in v1.3, slated for release in about a months time.
I'm going to cap videos to 1080p by default and have a config setting to customize this.
https://github.com/Owez/yark/blob/676074ee3d9e379d15e52ffe2e...
It would be nice to expose this setting via config file and/or the cli.