I just need someone to help me because no one knows anything. I'm trying to export a video to Media Encoder but right where it reached the end, it either crashes, downloads as a swf, or both. this is so frustrating, I spent 2 hours trying to figure it out, i could've finished and turned this project in by now. please help
exporting a video from animate uses computer resources. and it's possible you require more resources than available causing the crash.
so, you should test by first checking if the most basic animation say 10 or 20 frame tween exported for video causes a crash.
if it does not then delete about 1/2 your main timeline and test that. if you can export two videos (1st and 2nd half) successfully, you can then stitch them together, Free Video Joiner: Merge Your Video Online | Adobe Spark
Try exporting the video as a .mov and then take it into media encoder and compress it to what you want.