To be honest most of my SRV videos are at 2x speed so I can fit them to a single 6 or 7 minute music track. Also, at 1x I find they seem really slow whereas 2x, to me at least, is closer to what it feels like to be in those moments at the time.
Yeah, I've noticed that too-- It feels a lot faster when you're in the moment, and a lot slower / more sedate watching it later.