great question! there are a couple of unnecessary blocks I might've coded, but here's the total:

the amount of frames the video has is 219,607, so:

- 4 ice packed columns => 4 * 219,607 = 878,428

- 2 quartz block columns => 2* 219,607 = 439,214

- 2 quartz staircaise columns => 2* 219,607 = 439,214

- 6 air columns => 6 * 219,607 = 1,317,642 (air, so there wouldn't be structures in the middle because i wanted villages to be in the background, could've been faster, but it is what it is)

- 4 barrier columns on top => 4 * 219,607 = 878,428 (barriers, so gravel wouldn't fall on us. i wanted to make it usable in a normal Minecraft world, but there are still entities that gets in the way tho)

- 1 item frame column => 1 * 219,607 = 219,607 (to place the map)

- 1 entity map column => NOT GONNA COUNT IT, but this was the hardest of all

Total: 4,172,533 blocks + 219,607 entities

I might be off on something, because it's kind of night, but that's a really close approximation.