I'm not sure where I point it out in the video but around 50:43 , if you look at the wall right below the large statue , there's a golden block and it's clipping under the wall, as well as the fact there's a wall there when there shouldn't be. The map seems kind of glitched or it's hand-made and is in need of a touch-up , e.g. two of the other golden blocks are not following a 'grid' and are off-centered.
1:22:25 - I'm fairly certain I encounter a visual bug here