Chair exercises from YouTube

[Linda Pittsburgh]

Someone had posted, and I'm sorry I forget you name, that they use chair exercises found on youtube because of bad knees. I have the same situation and was wondering if they could tell me the specific video they use. There are a lot of them!
TIA - Linda

 

[Wendi70]

I can't think of the name of it but the gentleman leading is Curtis and they are geared for beginners or seniors.