What a wonderful video, thank you so much for sharing! It brought back a rush of memories of my late grandparents; both of them had a life long love of music, and I fondly recall how happy they were whenever they listened to the songs of their youth. I always thought of it as a gift because it gave me a little window to their past and a precious glimpse of what they were like so many years ago.
The residents you care for are lucky indeed, to have someone who cares so much. Personally, I think the staff in nursing homes are very special people, and don't get nearly enough credit for the amazing work they do.