Definitely mating behavior! Very good video of it too, not too many like that around ^^
Well this female was only in the tank for a few minutes before he jumped her. So after she was a little tired from the trip to my house I think.Consider that female easy going. I have seen my shrimps do it a few times, you should see the way some of those girls say no ;-) When she does say yes, you see the male gets on and the female stops moving for a few seconds. The first time I saw this I thought it's the male eating a dead female shrimp, but a few seconds later the female revived with joy ;-)
Yes, great video !