Pretty cool video by MegaStaratel (sorry, in Russian).
Still worthwhile watching.
https://www.youtube.com/watch?v=dVTvnaq3rIkFew notes of my own:
* the video starts in October and goes through March
* the rig is similar to double-deep (but those are Dadant frames I think; so equivalent to three-deep Lang)
* the room temperature fall below (-11C/12F) at times - no problem;
** appreciate how hard it is for the bees to move around at such temperatures - once left outside of the cluster, they quickly freeze
* the bee cluster starts at the bottom of level #1 in October and gradually climbs up to about mid-level #2 by March
* the video author remarks how the bee abdomens look obviously bloated in March - there are full of feces
If any questions about specific points in time in the video, I can answer.
But basically, he just remarks date and temperature and does few free comments of bee movements.