Feedback: the first demo video you linked is still marked private by youtube.
Back when I used to make timelapse videos of physical projects, the most handy interval I found was one frame every two seconds: when playing back, one second == one minute, one minute == one hour. Easy to keep track of actual time spent. (assuming the output is 30fps).
I used the same logic but with one frame per second and the output of 60 fps
Futureland (https://futureland.tv/) does something similar to this that I like.