Notice first he says it's happening in DA then he changes it to it happening in SA. How can the pawl be too short in SA but not in DA if it rides higher in SA?
After looking at schematics for the VI I ask myself how can the hammer fall and strike between the primer and case "in either action" without the cylinder being locked in place by the cylinder catch and most important the cylinder lock on the trigger engaged. I know it can't but that's what BIO said. If that's happening NO the gun is not safe.

Does the pawl complete the cylinder rotation just before the hammer falls? If so and BIO's hammer is dropping before that I'd say its a sear issue be it the DA hammer catch or if in SA the cocking notch/sear on the hammer. Because if the hammer drops before the pawl can complete rotation then the pawls not to short.

I'm not arguing, I'm discussing...