It fs up sometimes

Today me and my friend tried to make yt videos and after she left I did a ton of editing on iMovie. When I when to share it on yt, it said I needed more space. So, I deleted a ton of pics and videos including the ones I used in the video. I wish iMovie didnt need the videos to play. All of my 2 hours (not how long the video was) of editing and filming was gone. This has happened to me 3 times. I am saying that iMovie should get a saving button that you can use and would save the entire video. Even without the pictures and videos that make up the video. I can never make up for that hour or two of filming. I was finally going to make my first yt video and iMovie ruined it.

Mayat226 about iMovie, v2.2.3