Hi all, hope were all good

I have an issue when the cars warm and im sat stationary, the car idols and bounces between stalling and 1k. sometimes it stalls. video shows what its doing at the start and then i give it a rev and settles.

Any ideas? I havent changed my spark plugs in 2yrs ( i know thats bad) but im hoping thats all it is. What do we think

https://youtu.be/x9qSIpkk8N4

Thanks

Tom