Comment by nayuki
There are a number of niche videos on the topic of learn-to-bike that emphasizes the pedal-less balance method: https://www.youtube.com/watch?v=7zMOvVXGmH0 , https://www.youtube.com/watch?v=P7GKK3liv8M , https://www.youtube.com/watch?v=ELW3CgR-DW4 , https://www.youtube.com/watch?v=wqmzwVrkTU4 , https://www.youtube.com/watch?v=UOg1hHmGIQQ , etc.