Stretch Video’s How Often?

I have the worst flexibility out of anyone to start the GB stretching series. On top of that I have and issue with my L5 - S1. I think due to the lack of hip mobility. I was wondering a few things -

1.How often should I be performing these videos? Right now I am doing all three once a week.

2. What other stretching should be done on my days with no stretching video? Is there a general routine video?

I appreciate any input. 

Hi Nicholas, the entire stretch series, i mean the MD module, the TB and the FS module should be done once a week.