Not really about the timing. Props hit pavement, which stop the engine rather quickly. (Kind of like feathering with a bit more force.) You can see that all three blades end up with that nifty high-tech backsweep. Been there, done that, in a different type. Although I was not PIC, I will also admit that a gear up landing requires a team effort. Generally speaking, they don't do much damage to the airplane. If it wasn't for the sudden engine stoppage, they may not even rise to the level of a reportable incident. (My experience, for example, did not. An understanding airport manager helps in that department.) But...the engine stoppage requires a complete teardown, which is expensive. And that doesn't include the likely flat spots on the camshaft and or crankshaft.
Great video. Good material for and chapter/aeroclub/CAP squadron safety meeting.