Ignoramus8901 wrote:

https://www.youtube.com/watch?v=6C3OReUPPuQ

Would you say it sounds like a rod knock?
A rod knock would mostly follow the crank RPMs. I'm thinking that sounded
slower, so might be a bent pushrod, stuck valve, something like that. Rod
knocks are kind of low thumps, something in the valve train usually gives a
sharper tap tap.

But, REALLY hard to tell from a youtube video. You might pull the valve
cover and see if there's anything obvious, either static or with it running.

Jon