I have checked on YouTube and Pinterest but am not finding much help with this. The link to this page does have templates or pattern you can save and print out for the film strip itself. You would just have to cut a long strip of rolled fondant with a little Tylose powder added for stability. Attach film strips in sections with a bit of gum glue or thinned clear corn syrup. Print out the photos you want to add in a size that will fit the film strip, attach the same way. I am guessing you have an edible printer and edible paper. If not, you could use a regular printer with photo paper and just make sure the guests know they are not edible. Here is the link, I hope it helps. http://www.presentation-process.com/powerpoint-timeline-template-filmstrip.html#.VfjsohFViko
There are many tutorials on Pinterest or YouTube on how to make the metal film reels out of gumpaste or fondant with Tylose.
Shirley