feature request: add whole seconds to offset

[miketunes]

Sorry, I wasn't sure where to put this. I notice alot of videos may have some sort of intro and may need to offset much more. It takes forever to forward 30 seconds when doing it by milliseconds. It may be useful to have the preview start in the middle of the song or something, sometimes they don't sing for 15 seconds, so I adjust offset, wait , adjust, wait. So it may take 2-3 minutes to get the timing right.

Just some suggestions I noticed, if there's a reddit thread or somewhere better to post I'm happy to move it there.