I would really appreciate any advice in fixing my problem. I'm trying to upload a video to YouTube from Windows Live Movie Maker by converting my WLMP file to an MP4 or WMV file and every time after 99% of the conversion, I get the error, "Sorry, your movie can't be saved. Find any missing files or remove the unusable items from your project, and then try again. Error 0x87260103." I spent 2 hours preparing, 6 hours editing, and now about 15 hours trying to convert this video into a file acceptable by YouTube. I've watched every single YouTube video and reviewed every single answer to this question online. What I've done so far includes attempting to save the file as a movie (which everyone says should convert the file) as an MP4 file and a WMV file (all that's available), lowered the quality, expanded and contracted the number of movie frames, reduced the speed of the areas that I sped up the video, reinstalled (or updated) Windows Essentials, checked my video driver, checked my memory, tried to upload straight to YouTube from WLMM, saved the WLMP file to multiple areas on my computer, and probably more things. In the past I created a similar video using WLMM and had no problems. The only differences between the two videos are the cameras I used to film and the amount of editing (more editing on the file I'm having issues with). This makes me believe that the issue is with my editing, however I'm trying to avoid completely starting over the process to see what may be the problem. Is there anything I'm overlooking that may be causing this error? Here's the URL: 

https://onedrive.live.com/redir?resid=27E87FD468D55CB0!107&authkey=!AFQzM0xq_E1pzVs&ithint=file%2cwlmp

I would make this a link enabling editing, but I'm not sure I'd like my video to be available to edit to just anybody (no disrespect). If you found the issue causing this error, could you please point it out? I don't have much experience with computers, so I may need you to tell me what I need to do. 

Thank you very much for the help,

ObsCuber