Hi Jim. Here are a few of my favorites. Type in 50+ in the search bar to find more.

Here are a few collections you might enjoy:
Strength and HIIT https://grokker.com/fitness/collection/strength-and-hiit/603f8f46b356ab7d31b8ef00
Mobility, Recovery, Physical Therapy https://grokker.com/yoga/collection/mobility-recovery-physical-therapy/603eb9efb356ab7d31b83fa0
Ellen Barrett, Jane Fonda, Denise Austin, GymRa and Jessica Smith https://grokker.com/fitness/collection/ellen-barrett-jane-fonda-denise-austin-gymra-and/603ad1c4b356ab7d31b48e73
Barre https://grokker.com/fitness/collection/barre/605edc48c1a5914c3303952c
Pilates: Traditional and Modern Fusion https://grokker.com/fitness/collection/pilates-traditional-modern-fusion/605edf53c1a5914c330396b3
Qigong and Taoflow https://grokker.com/yoga/collection/qigong-and-taoflow/603ea838b356ab7d31b81cf2
Flow Yoga: Beginner-Intermediate https://grokker.com/yoga/collection/flow-yoga-beginner-intermediate/60ce43f84cb7214269a7ea13
Gentle Yoga https://grokker.com/yoga/collection/gentle-yoga/603f6d0ab356ab7d31b8bc7a
Yoga with Esther Ekhart https://grokker.com/yoga/collection/yoga-with-esther-ekhart-of-ekhart-yoga-and-yogatic/600923e63fa6704a3438c609
Yoga with Adriene Mishler https://grokker.com/fitness/collection/yoga-with-adriene-mishler/6009c7453fa6704a3439b548

new mobility program from Sarah Kusch: https://grokker.com/fitness/stretching-and-mobility/program/10-minute-mobility-snacks/645c259bd647f852e2e5d405