This video gives you an introduction to the BIOS and UEFI with a walk through of what they are and some examples on how they work.
MBR: https://en.wikipedia.org/wiki/Master_...
GPT: https://en.wikipedia.org/wiki/GUID_Pa...
00:00 - In This Video
00:08 - Intro
00:21 - So what is it?
02:34 - The Differences
06:24 - Legacy BIOS
08:33 - UEFI BIOS
13:10 - Wrap Up
14:42 - Outro
14:59 - Fails