Video Exporting Error

For some reason, when I try to export my animation, it keeps giving me "unkown error; closing animate" and if I try to export it with the publish button in the corner, it stops at 60% and never goes up!

I looked at other posts and somehow the methods of theirs, such as removing the audio or changing the file type failed! The file is 33.3 Megabytes and is about 1 - 2 minutes long.

Now I have tried using some websites that convert swf to mp4 but they don't work either.

I seriously don't know the issue to this and need some help.