I think it depends on what your knee issues are caused by. Is it arthritis? Is is musculature support around the knees being weaker? Do you know what exacerbates it? I'm sorry I don't know about the video you mentioned.
I have arthritis, which I discovered a few years ago as I was training to walk the Susan Komen. I've added more fish to my diet and supps include glucosamine - both capsule and liquid, fish oil, as well as hyaluronic acid.
For me it has also helped to strengthen the muscles that support the knee, but that has been a slow process. Many of you know I am a proponent of heavy lifting, but that is definitely not for everyone, so I think if you know the source of the pain it might help you deal with it. Sorry that didn't add much. I hope to find some relief.