video codec

I'm a good photographer with a camera but not very good at Mavic 2 Pro video shots. Friends are asking me to shoot residential videos and I need simple editing software to cut out jerkiness (when I pan the wrong way and have to pan back). Anybody have a recommended software that runs on a PC?

I just got a Mavic Air 2 brand new from Amazon, and I'm having issues with some weird unwanted video compression/codec, and also getting grain/noise while shooting in broad daylight. You can see it if you look closely at the tree foliage. I shot this in particular clip in 4K, but this problem...