Sounds okay to me. Is it idling at higher revvs than normal? Might be a sign of something.
If not then I reckon you're good to be honest. Hard to be exact over video but sounds fine to me.
When was the last time you had it running and had the bonnet open while it was running?
Sometimes the hydraulic valve lifters can create a bit of a racket if they're not charged up with oil. Usually if the engine's not been run for a while.
