Very nice rattle on that snake! I bet even I could hear it.
As a side note... No permit is necessary to keep a venomous reptile in Arizona so long as it's native to this state; except to collect one from the wild, then a valid hunting license is required. The bag limit on rattlesnakes in Arizona is 4 per year per species (that pertains to keeping and killing!). Four species of Arizona rattlesnakes are protected and may not be captured, harmed, killed, pursued, etc... Those are the Desert Massasauga, the Twin Spotted Rattlesnake, The Banded Rock Rattlesnake, and the Ridge Nosed Rattlesnake. Non native venomous snakes are prohibited in Arizona.
Also, it is not legal to release a captive animal in Arizona. Sometimes captive reptiles carry germs that can be detrimental to the wild population.... A long term captive reptile will actually forget how to effectively hunt and hide, thereby becoming easy prey itself and/or starve for lack of hunting success.