How different wall anchors work - GIF

[hemmjo]

Interested video, however the purpose of the video is unclear. It shows incorrect use of all the anchors.

Specifically the Yellow, Metal, and Gray are designed to be used various, but specific thickness wall materials with a hollow cavity behind. They are designed such that the wings can expand behind the wall and spread any load against a larger surface.

The red anchor is to be used in a hole where it is fully confined by the hole. Typically this would be something like concrete or masonry where it can expand and get a tight grip in the sides of the hole. However in the example, dismissing the fact that the wood itself would hold better than the plastic, the anchor SHOULD have been installed into the bottom piece then the screw inserted through the top piece in order to pull the two pieces together.

I can not comment on nail and the wood dowel, have never seen that before.

Having not seen the video in context, it almost seems it was made specifically to show the incorrect way to use anchors.