Inclusion Criteria:  live in Australia; are aged 45 years or over; have experienced activity-related knee pain during the past 3 months or have been told by a health professional that they have knee OA, ; and are able to easily understand verbal and written English language.  Exclusion Criteria:  have had a hip or knee joint replacement; are scheduled/referred to see an orthopaedic surgeon or are already on a waiting list for hip or knee joint replacement; have any type of systemic arthritis (e.g. rheumatoid arthritis, gout), or have morning stiffness that lasts longer than 30 minutes; have a health condition that makes them unable to walk (since it will be difficult for people who cannot walk to follow the recommendations made in either video); have seen a health professional for their knee pain during the previous six months