Baja makes a doodlebug called a warrior, they had a magnetic flywheel and a set of coils that sat underneath, they used it to give juice to the headlights on that model, question is will those components meant for a 79/212 type sized engine fit to a 49, I've never gotten an answer to that question I've thought about. I've also noticed only the bigger 4 stroke snow blowers had a coil and flywheel to power things like headlights and hand warmers, but never such a thing on those small ones that used a 49 Honda type motor...
If I was seriously wondering I'd dig up any info I could on the sizing of the parts, and I would obviously try to dissect the video more for clues and possibly actually try to message the guy, at the very least he could send you in the right direction if he responds.