Note. The examples of Origami below all need a square piece of paper.
How to turn an A4 sheet of paper into a perfect Square // Origami 折り紙
https://www.youtube.com/watch?v=PPxi1dIWRws
Daily Origami
Daily Origami: 055 - Bunny Rabbit
http://www.youtube.com/watch?v=7bhmV9pnQL8
Daily Origami: 226 - Valentine's Day - Heart with a Stand
https://www.youtube.com/watch?v=zp_vOhv8IrQ
How to make an easy origami dog
https://www.youtube.com/watch?v=kXE1OluMfZU
How to make an easy origami butterfly
https://www.youtube.com/watch?v=zjjhyjZwmwo
How to make an origami fox
https://www.youtube.com/watch?v=OyhyrtPfgH0
Daily Origami: 002 - Jumping Frogs
http://www.youtube.com/watch?v=2p4SyN8Y8Is
Daily Origami: 058 - Fancy Horse
http://www.youtube.com/watch?v=0vBSHVcC_gM
Daily Origami: 273 - Flapping Bird
http://www.youtube.com/watch?v=OzGHkHTFDs4
How to make an easy origami crane
Other origami projects
Newspaper Hats
http://www.arvindguptatoys.com/toys/newspapercaps.html
Hexaflexagons
Origami and science and maths
Folding the James Webb Space Telescope to Fit Inside the Ariane V Rocket Fairing
https://www.youtube.com/watch?v=Li6We0l5pYQ
Foldit - Solve puzzles for science!
Folding way-new origami - Robert Lang
http://www.youtube.com/watch?v=UNdD5Kxdkpg
11 Levels of Origami: Easy to Complex | WIRED
https://www.youtube.com/watch?v=MDwPXRy9IFc
Symmetry Artist
https://www.mathsisfun.com/geometry/symmetry-artist.html
Here's What 15 Celebs Would Look Like If Their Faces Were Symmetrical
https://www.buzzfeed.com/omarvillegas/heres-what-15-celebs-would-look-like-if-their-faces-were-sym
Euclid's Big Problem - Numberphile
https://www.youtube.com/watch?v=6Lm9EHhbJAY
How to Trisect an Angle with Origami - Numberphile
https://www.youtube.com/watch?v=6Lm9EHhbJAY
“Origami is more powerful than Euclidean geometry”
More about Hexaflexagons
Walk along gliders and other projects
via Science toy maker
https://sciencetoymaker.org/walkalong-glider-airsurf-air-surfing/