You could consider our low impact cardio program with Ellen Barrett and I have also included two mobility programs with Angelo Dela Cruz and finally a Yoga Program with Sherry Zak Morris. She has a specific video for arthritis pain relief. Hope you can find some videos in these programs to help you.
https://grokker.com/fitness/cardio/program/walk-strong-low-impact-cardio-with-ellen-barrett/5887e4e30eeec67481fa03fa
https://grokker.com/fitness/stretching-and-mobility/program/5-to-thrive/5bd7a4870552fe684750cfa0
https://grokker.com/fitness/flexibility-and-balance/program/flexibility-and-control/5b2aa40759a78e3cd220e9d3
https://grokker.com/yoga/seniors/program/yoga-for-50-with-sherry-zak-morris/56df3bd9c5bf9b585631c7dd