Problem with Video Length

So I have no idea how this happened but, I was just making a video on CapCut and the actual part of the video is only 4 minutes and 11 seconds long, but after that there’s just this black screen that I can’t get rid of (I didn’t even place it there) and it’s now made my video 44 minutes long. I don’t want to re-do the video I made since it took forever to make but at the same time I can’t save my video into my gallery to upload to the internet since the video is way too long and I don’t have the storage for it.

Does anyone have any solutions to this? Please get back to me as soon as possible