Video, though, that's my favorite, because I can have the moving model to follow while still being able to adapt as needed.
There are 2 more posts on this subject: part 2, part 3)
The Fitness Blender Youtube channel has a lot of videos that are much too challenging for me -I get worn out just looking at them- but I've found quite a few that I like to use. These include warm-ups and cool-downs.
The first one is specifically targeted for functional upper body strength rather than for toning.
Below are three more embedded from that channel:
This link is to a Fitness Blender video at Youtube that focuses on exercises to improve posture and prevent hunched shoulders. I hope I can maintain, and maybe even build, strength. I want to avoid frailty if at all possible.