Have you ever seen a silent movie?
Of course. I used to watch them all the time.

I'm not quite that old & the "talkies" had actually been invented long before I was born. Silent movies were shown regularly on TV & also the cinema when I was young, rather like old B movies now. Some of those old silent epics are still regarded as classics.
My favourites were Harold Lloyd, Buster Keaton & the old Keystone Cops comedies. I never quite got with Charlie Chaplin. He was hilarious untl I watched one of his films shown at the correct speed. His later efforts like "The Great Dictator" were much better. IMHO
Acting in silent films was an art form in its own right. Laurel & Hardy were about the only silent movie stars to make a successful conversion to talkies. They still make me laugh now.

PS. It's worth remembering there was no sound track at all. The music was played on the piano, sometimes from sheet music distributed with the film but more often 'ad lib' by the resident pianist. This again was an art form in its own right. A good pianist could make all the difference to the film.