Nice video is that sound I hear, are you using Arlo Wireless battery powered? I thought Arlo Wireless was not able to record sound.
Neat. I have 3 feeders and about 6 hummers that chase each other around constantly. I though it would be neat if they could stick around instead of having to fly and drink so, I cut up a coat hanger and twisted it around the hanging device and made perches for them to sit on at the feeder. It works perfect for their tiny feet to hold on to. Now I have 3 dedicated hummers that sit at each one like guard dogs defending their own big bottle. Unbelievable. I call them juice alcoholics and it's neat to see them sitting there instead of hit and run type manuvers. Give it a try!