This is the best example I've seen of someone making a "self or stick bow" from a single piece of wood using the old ways.
He selects the wood.....uses traditional primitive tools to harvest the wood.....makes multiple lengthwise splits to get the shape....called a stave.....works it down to the basic shape .....then uses a stone scraper to finish it out.
He then show how he gathers bark fiber to weave the string.....gathers more wood and discarded bird feathers for arrows and uses fire to straighten and harden the the arrows.
Finally....demonstrates shooting the bow....even using a traditional draw style....it actually shoots pretty well!!
https://www.youtube.com/watch?v=SLoukoBs8TE