Queen Bumblebees visit Early Blueberry Blossoms shows the queens getting pollen from these blossoms in the Juneau area in late March of 2019.
This video was taken with the Panasonic FZ300 camera set at 120 frames per second to help illustrate their behavior better.
The species of bumblebee looks like the Black Tail Bumble Bee (Bombus melanopygus). This species is one of the earliest to emerge and start nesting.