I watched it. It was interesting to a point but I'm not sure if it's useful or dangerous.

I think there are some things DIYers shouldn't mess with and HVAC equipment is perhaps at the top of that list.

I liked how each component of the furnace was explained. Parts were disassembled and multiple versions of the same part was shown. I intended it to be used as a general reference for homeowners to lean about their furnace, rather than trying to repair it themselves.