acting out

Hello, I have a flashy faun boxer who is approximately two years old and today he seems to have a major issue and is acting out. I am not sure what is wrong nor how to accurately describe it... I took a video of how he is acting and how he currently looks so you guys can see him... Hopefully...

We've had our dog, Dixie, for a year and she's a great dog. We got her from a no kill shelter, she's approx 5 yrs old, she's housebroken, walks on a leash nicely and knows several tricks... Not aggressive and rarely barks. She's been the perfect dog until this past month. Three times this month...