Leaderboard

haven't watched the vid but likely he meant Bb and F with "both". both those chords would be functions of the G minor scale. though the F could also be a function of G mixolydian mode, while Bb more significantly demands a change to some scale including the minor third interval of G. meaning the latter is definitely a more "decisive" chord. you can easily play a lotta stuff over a simple G - F chord structure, and be very ambiguous about whether it's a major or minor G scale. I - bVII is good for bluesy stuff eg., meaning you play around with the "blue notes". with G - Bb however, you're way more clearly going from a major G to a minor G scale, and back again. if i were you i would play around a bit with the classic 12 bar blues scheme. even just a simple I - IV progression is enough to see how gratifying it is to eg. change from a major third to a minor third, whenever the change to IV happens. that's blue notes. "the blues" is a good conceptual counterpart to the whole diatonic or greek scale stuff. it enables a better understanding of most of our contemporary 20th century music, without being too technical. rock, metal, jazz, you name it.