Backed up files on hard drive but cant find my movies, how can i retrieve?

Hi, My H.P Laptop was having problems last night, so basically i did a full back up (whilst in safe mode) to my external hardrive, and then proceeded to do a system recovery (restored it back to factory settings). The main thing i wanted to save during the back up was my collection of movies. So i have now restored all my files from the back up i did onto a different computer – all the movie folders are there, and the information files e.t.c however..the actual video or movie file is missing?!?! How do i get these back.. Please Help!