I really liked the freely available TeamBodyProject ones I found on YouTube- (found them by googling “low impact standing workouts”). Eventually, I moved on to their website, where there is a more complete range of progressive, graded workout programs (including Pilates! and balance practice and weights). There’s a series for Seniors, and others, called Real Start, for those of any age who are out of shape or needing seated workouts, progressing to quite challenging workouts for very fit people.
Without paying anything (no credit card required to sign up), it is possible to join as a member so that you really have several weeks to test it. If it works for you you can decide whether to join formally for longer access. I found it quite affordable for what it provides. And there are helpful forums too.
Or you can just continue to use the free YouTube ones.
But no matter what you try, please don’t give up until you find something you enjoy enough to keep going. On YouTube, I did try Joe Wicks, whose efforts I admire, but for me his voice grates and some of his suggested moves for Seniors seemed a little pointlessly risky for dodgy backs. I also tried Leslie Sansone walking ones, but found them very repetitive. However, several people on here like both Joe Wicks and Leslie, so definitely worth a try. Persistence in trying will pay off.
Several people here also suggested getting a dog. My dog has passed away, and I still miss her, but I will be looking for another after the pandemic has receded.
Lastly, I too struggle with motivation, ( especially without a dog), but a certain amount of daily exercise is as necessary as brushing your teeth and bathing. Just as you would never ask yourself whether you feel like brushing your teeth today, you need to just schedule it and do it. I purchased a step counter too which reminds me not to sit too long, as well as keeping track of my steps and serves as a watch.
Once you start, it’s easier to continue. And I think it will be so worth it for all of us it to be able to be as physically independent and mobile as long as possible.