How much disk space does an HD 1280x720 music video use? and how much a Full HD 1920x1080 music video?

I have one music video with HD 720p resolution (1280x720) and takes up 87 MB, another having the same resolution 1280x720 takes up 134 MB. One video with Full HD 1080p resolution (1920x1080) takes 144 MB I mean, How much disk space does an HD 1280x720 music video need to be REAL HD and REAL Full HD? Because... show more I have one music video with HD 720p resolution (1280x720) and takes up 87 MB, another having the same resolution 1280x720 takes up 134 MB.
One video with Full HD 1080p resolution (1920x1080) takes 144 MB

I mean, How much disk space does an HD 1280x720 music video need to be REAL HD and REAL Full HD?

Because I think that if a music video take less than 100 MB is compressed and is not real HD or Full HD.

I also checked out the TVRips from Palladia availables on the internet, but once you download it and play it, you realize these Trips are not real ''Full HD (1920x1080) or (1280x720) since these videos do not fit the screen not using all the pixels.

Where can I download (for free) REAL Full HD Full HD 1080p resolution (1920x1080) and HD 720p resolution (1280x720) music videos fitting screen?
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