great late season bee plant

So we purchased and planted these Blue Mist Shrubs just for the color combo factor only to find that it is a bee magnet. I can remember on a few occasions seeing at least 20-30 bees at a time on these babies! And they bloom late summer and last for about 4 weeks so it keeps the bees around for a long time. On another note, can anyone settle the argument for us here as to what type of bee these are in the video? Bumble or Carpenter?

Bee Video

Those don't look or fly like carpenter bees to me. I'm not a bee expert but I did have a case of carpenter bees in an old deck last summer.

I have educated myself on bees alot the last few months. you are very correct. these are Bumble Bees for sure.