These are close up images of a Spider that I believe is an adult male Primitive Hunting Spider, Plectreurys tristis. I'm including extra shots of him in bright sunlight and in the shade, to help other people when comparing images.
I'm not sure about the geographic range of the other species, but most of them are not known to live in Arizona and P. tristis is known to live in this area.
Here is a link to the ID source document on the spider family Plectreuridae that I used, from the American Museum of Natural History (PDF, 54 pages - dated 1958): AMNH Digital Library - The Spider Family Plectreuridea
Here is a link to his video (3.5min. duration): ♂ Primitive Hunting Spider - Species?
Full Size Image: Click Here
NOTE: Though his coloring is mostly all-black, some other things can be seen. Slightly paler, grayish or off-white spots, on the ventral side of the leg joints are visible in some views.
Also, he has an obvious, thick grey stripe, on the top front, middle of his abdomen. The carapace is smooth and shiny near the eyes and the rest of it is more matted, but it's almost hairless and more shiny than the abdomen.