What I like so much about this approach is that it begins at the moment the players has the vision of the idea or the motif. I've read books that give annotation of entire games, and books that give annotation of endgame themes. This approach, however, give us the "vision" of creation. This was very educational -- learning how to create a motif. It's not enough to just know how to execute a motif -- you must also learn to build a plan. Alexander Kotov would have enjoyed this lesson. You are thinking like a grandmaster.
There are two points that I think are important that were implied in the video, but not directly addressed.
Rb5 established the key position
for white. Later you said "this position supports itself." This self-supporting position is the key to a rook and two pawns endgames. If the enemy king is in front of the pawns then your king may have to participate, but if the enemy king is to the side, distant, or behind the pawns then the position will indeed suppor itself against the enemy rook. Absolutely beautiful!!
You did not state the reason for white push to h4 directly. It was to annex space, and to create a path
for the white king to travel using his pawn on g2 as a shield. Later you did mention the king used this path, but it is important to realize that white created this path with this move.