Now the same weedeater/string trimmer won't start! What the hey!

This is the same trimmer from the previous vid showing how to tune the engine. One week later I could not even get it started! Figured it had to be something I previously did, but turned out it wasn't. It was a simple issue to fix but not so simple to detect.
UPDATE: In fact the fuel lines were correct. The reason for lack of fuel flow was the restriction through the tank line hole. You DO need to use the fuel line connectors to transit into the tank!