3b (75).mp4
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MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. MP4 allows streaming over the Internet.The only official filename extension for MPEG-4 Part 14 files is .mp4, but many have other extensions, most commonly .m4a and .m4p.
When inspecting sample.mp4 file's binary data using any Hex Viewer, like Active@ Disk Editor we can see it starts with a signature ftyp (hex: 66 74 79 70) at offset 4, which defines QuickTime Container File Type.
All lecture video files are in MP4 format. The URLs are of the form lectures/ece5625/Lecture#.mp4, where # is 1, 2, ... Right clicking over the links should give you the option of copying the URL. The .mp4 file size is typically 200 MB per 75 min lecture. 781b155fdc