It runs, so you have to give it that, and I think the position adjuster for the flame is a really nice feature. Flywheels may be a bit "Wonky", but I've seen worse than that on what are supposedly name brand engines as well. You are probably wise not to go down the petrol road. I've dabbled my toe into it and do find it of some interest, though I'm trying hard to not get any too interested, still greatly preferring steam and hot air engines.
Good video .... I enjoyed watching it!!!