I have trouble activating 2 planes like this on the tuteral
The plane which is not perpendicular to the center line of the part. I’m getting frustrated. My version is the new one
Hi, sorry for the trouble. You found an obsolete tutorial video, you can find the current video here: https://www.shapr3d.com/videotutorials/construction-axis
Hi - yes, you are right - the axis creation showed in the video does not exist anymore. You can use the “Through a cylinder or cone” axis creation method. See video below 
https://drive.google.com/file/d/11JjPfaCS4mbnli4A8K-pakBO25ozpRnT/view?usp=sharing