Note that I've included the channel for each so that you can access the collection of each channel's videos.
Are You Alone (In The Universe)?
Kurzgesagt – In a Nutshell (7 min.)
https://youtu.be/PKMQzkIiB0Y
Common Misconceptions About Evolution:
SciShow (9 minutes)
https://youtu.be/IPjiFG43ZZg
The Cambrian Extinction Never Happened?
PBS Eons (8 minutes)
https://youtu.be/LhyQ5z5f-m8
Why Are You Always Tired?
Tired of feeling tired? Here are some helpful tips!
AsapSCIENCE (3 minutes)
https://youtu.be/nn42RC1zT_A
480 Short TED-ED Talks (5 min.)
Click 'auto play' on for continuous play:
http://www.youtube.com/playlist?list=PLJicmE8fK0EiEzttYMD1zYkT-SmNf323z