Here you can find an image collection of the posters and screencaps from the movies in which Yul Brynner acted, or even made a special appearance. This collection of posters is over 300 images divided in over 10 different languages and versions or designs in which you will be able to appreciate the beauty of the artwork made back in those days.
And as for the screencaps, they have up to 300 images per movie, many of them in Hi-Res. Below there’s the movie list, each one of them has a different number of poster images and screencaps available. Also, for each movie there’s some useful information and if you wish, how to get them through Amazon.
Movie Screencaps (constantly updated)
Notes: I didn’t include The Picasso Summer (1969) in which Yul appears to play a guest (uncredited), because I didn’t find anything about it, and I don’t know if it’s because its showings were never released in theaters, they were only on television, and also the short film Lost to the Revolution (1980) in which Yul is the narrator, for the same reasons I wrote above.