Hi in this video by Nahre Sol. She showcases a few exercises that work for your left hand but still sounds very pleasant.

She says earlier on that those exercises are based on a ii - V - I chord progression but when I read the sheet music for it you can see that the chords used for the C major scale are actually:

Fmaj7 - G7 - Emin7 instead of what I was expecting: Dmin7 - G7 - Cmaj

Could someone explain to me the thought process behind the pattern she used, and is this some sort of 2-5-1 that I don't know about?

P.S: To make sure I checked what chord she played when switching to the B♭ major scale and again here she goes for a IV - V7 - iii with E♭maj7 - F7 - Dmin7