My Spanish video presentation got deleted

Ok so fun story…
My phone had not been working recently, so I decided to get a new phone… Anyway, I had a Spanish project that was due, and I was getting ready to turn it in. When I went into iMovie it kept saying, "downloading from iCloud". So, I went onto YouTube to try to find a way to fix this (bad choice on my part) , and it said to download and keep originals… That also did not work. I then saw something that said to turn off iCloud photos. I clicked this button and now all my photos+ videos (including my Spanish prez) ARE GONE! I'm freaking out. Is there anyway to get it back? It said it was stored in the iCloud when I turned it off, but it's no longer in my camera roll.

Try going to iCloud from a computer and see if it is there.