This is shown on JamesLankford.com, as well as the campaign's YouTube account:
Straight Talk with James Lankford: Freedom Commercial
This one is on YouTube, but not on the website (that I can find):
Straight Talk with James Lankford: Benghazi Commercial
Lankford has also added a whole host of "My Stance" videos, describing his position on many fiscal, moral, and foreign policy issues. You can view them at this link.