Interesting. Note the building is supported above ground on piles. This is done to prevent the permafrost melting due to the building heat.
The only time I’ve noticed this is at Churchill, Manitoba, although probably a common practice at many Arctic airfields.
I note that the passengers are boarding an Mi-8. When I worked in Vietnam, the local helicopter company had Mi-8s and Super Pumas. The Vietsovpetro JV used the Mi-8s and the foreign operators used the Super Pumas. The Mi-8s weren’t acceptable due to inadequate emergency exits.