So the band CHVRCHES came up elsewhere a couple days ago, and I mentioned that around ten years ago I put together a mashup of their standout banger Clearest Blue with that one Alan Walker track, Fade, and I did it the "traditional" way by matching waveforms in Audacity.

Turns out I did a mashup of the music videos too, which I found in backups this morning: https://makertube.net/w/jZ2diTKagsXHRoAejK6fjs

I should go back to doing mashup MVs at some point: this turned out great.