Sometimes we have to think beyond our own specific circumstances and consider that there are folks out there that may the money to but a product but lack the good sense to use it properly. You are a part 107 certified pilot... Good for you but how does the seller of a product know that? If you...
How many times have you purchased a product with seemingly absurd warning labels on the product like hair dryers that warn the buyer not to use it in the shower or the label on Preparation H warning the buyer that the product should not be used orally? Because there are a heap of duffusses out...
Transmission distance will also be affected by other RF fields including WIFI, nearby cell towers, your cellphone if WIFI is enabled, etc. Have you tried flying in a different place where there might be less interference?
At first it sounded like a bad motor bearing but if you watch closely and listen the sounds are coincident with the movement of the camera (if you exclude the one cat fart). I would check the camera gimbal manually for rough spots by slowly rotating the gimbal in all directions and feeling for...