How to Wear a Lapel Flower Pin - Never Lose it again 

I don’t know that one. Do you have a link so I can see it?

It's the trinity knot. Here's my instructional video on how to tie the trinity knot. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-B0azERTcVgE.htmlsi=Thg-HzlUrAyBJuDf

@@PatrickNovotny thank you sir

My plain pocket squares came from lechateau on sale. Poor quality, but I wanted them for video demonstrations. Patterned ones came from “the Dark Knot” Plain ones came from local men’s suit stores. Designer ones came from Sterling Scott Ties

If you are going to wear it often I would start with white cotton and then shades of blue to match your dress shirts. Not your ties. Any major department store that carry men’s suits will have cotton pocket squares. Later you can add silk, more expensive, to compliment you outfits. Online shopping is hit and miss on quality and price. Aim for a pockets square that is at least 11 inches. The small ones are almost laughable and not work paying for.

I would like the link, as well

It looks like a simple eldredge knot with a half twist in the overlap. Should be easy to figure out with some experimenting.