Friday 12th October 2018:

H.267-Codec=code and decode

1920×1080p-progressive (height in pixels of image)

Files are stored in sectors. Rendering makes it neat and organised.

Lossy:compressed

A file that had been destroyed, can't be the exact same as it was before. 

Mp4    .wmv   small file size MB

Lossless:uncompressed 

.mov .avi