WINONA, Minn. — At a time when YouTube wasn’t much of a thing, physical therapist Bob Schrupp started making videos in his basement to help people alleviate pain or live pain-free lives. In the early years, the “Bob & Brad” videos struggled to find an audience, and Schrupp almost gave up on the whole thing. Although the condition forced Schrupp to diminish and then withdraw his on-screen role as one-half of Bob & Brad, Schrupp continued to direct, write content and contribute ideas until his death. Today, the company sells scores of Bob & Brad products, some invented by them, others endorsed, in 4,000 Walmart stores. After incorporating stretching exercises from watching a Bob & Brad video, her knee within weeks began to feel better and she canceled the surgery.