Interesting approach, i like the aesthetic. When you say 'add audio' is a big task , does this mean the videos after cutting up don't have audio, or just that the preview doesn't have audio? the latter wouldn't be a problem for the use case of slicing up home videos. I have the same task as parent, might have to make a weekend project out of it.

Thanks :) The preview doesn't play audio. But the sliced output has audio.

The UX should be a lot smoother once I get around to non-blocking inputs and the audio player. For now, futzing around with mpv or a fully-featured video editor might be the way to go.