Cylinder 2 fails, and cylinder 3 partly fails

[Sune_Rasmussen]

Hi Experts

I have a Aveo Family 1,5 from 2012.

Just couple of days ago i got problems with cylinder 2 starts to fail. - see video


While reviewing i see also cylinder 3 fails at low rpm.

Normally the car runs fine, but i always had a little low power at low rpm, so i'm not sure if cylinder 3 also failed before. But car sounds absolutely fine and works well normally, so i think the 2 cylinders started to fail simoultaniously.

Any best recommendation what to change? Or how to best proceed troubleshooting? - i do not have diagnostic tool even i see motor lamp is on