Lots of us have issues, knee pain is a common one. Many people stop exercising to avoid the pain, but the truth is, most of the time exercising will help, so these exercises could well help strengthen the muscles in your hips/glutes that could have weakness contributing to the knee pain. Obviously you need to get it checked out by a medical professional in case there is something else going on, but most of us could do a bit more work on strengthening muscles, mobility and stretching.