Hah, more than a month later, I do, at last, have a timelapse video!
Looking back at this, I am still pleased with how much I managed to get done, but I think I gave myself a little too much mental credit for the days where I "worked really hard" to carve out writing time (i.e., writing on the bus/train, some of those late nights after a long day of other work)... I didn't realise I took twelve "well-earned days off", and I bet I could have found ways to write for two of three of those without really sacrificing things that mattered to me.
The screen-recording continues to be an incredibly motivating tool for focus, for me. And I particularly liked the way that a two-hour stretch felt, shoved into the margins of my life on the road -- it was a small enough stretch of time that I didn't feel overwhelmed by the idea of finding time to do it, but a large enough stretch of time that once I sat down to work I could get some real thinking done.
I'd be keen to try something like this again, especially during a month that I'm not living out of a suitcase!