Can I get my old videos put back in the gallery of my galaxy s5 because I accidentally deleted them.

[AC Question]

My friend put the VIDEOS from my old phone into the GALLERY of my new Galaxy S5 phone, by using the old phones sd card. He didn't back them up. Now I lost my old phones sd card and I accidentally deleted my VIDEOS (in the gallery) from my new Galaxy S5. Is there anything I can do, hopefully for FREE, to get them back? Could they somehow be saved deep in my phone. These videos are of my daughter when she was young and now she is 18. These videos mean alot to me. Please help.