I see little advantage of changing your os from a conventional ssd to a m.2 ssd.
That is just a format change.
If you mean a X4 speed m.2 device like a Samsung 950 pro, then you will indeed get faster sequential speeds.
Your editing performance could be cpu limited, or drive limited.
One way to guess if the limitation is cpu, try reducing your max cpu utilixation from 100% to 90% and see what effect it has.
You do this in power options under windows 7; No idea how in windows 10.
If your editing currently used hard drives, and they are the slow part, you will about double your capability by using ssd drives which are 2-3x faster than the fastest hard drives in sequential operations.
If you must stick with hard drives, see if you can't...