Back and biceps routine

This is the routine I have been following for the past eight or nine weeks.  It is time to change it, so before I do, I thought I'd log this one.  Details of weights / sets are in the video description.  I finished with some roll outs, which I have been working on intermittently for the past few months.  My last video to include this exercise shows that I was not getting my body close enough to the floor.  Now I am happy with the proximity to the floor and just need to focus on extension of my arms, trying to avoid bending them at the elbow.