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AVI vs MP4 – What is the Difference & Which One is Better?
Why is there a big difference of file size between video format .TS and .MP4? Both have the same video quality, but there is a huge difference in file size. - Quora
MPEG4 vs MP4: Which Format Do You Need
MPEG4 vs MP4 : A 3-Minute Explanation to Clear Your Confusion