What do you mean by "downloaded it to function as an mpeg"? Are you sure you haven't just copied your original source clip?
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Can you give us a bit more info?
What is your Project Preset?
What are the complete details of your source footage?
What Effects did you add in the Timeline to those source footage Clips?
What were your Export/Share settings?
Did you Export/Share the complete Timeline, or limit that with the WAB (Work Area Bar)?