Help with background music for soundless home videos

Hi!

What background music could I use for watching old digitized recordings without sound of my parents and grandparents? Any suggestions of genre, playlists, artists or songs would be great!

I've digitized around 3h of analog video that my grandfather shot. It's a lot of family gatherings, vacations and sorts from the 70s. The recordings are without sound, and I imagine it would be a better viewing experience to have some sort of background music.