In the Top of this Forum, there is a link to DOCS where there is a link to Installations ( of Various types and Hardware ( PI included )
Best approach is reading/following these instead of Year Old, YT’s , Which noone is going to watch to help you ( spite you linked to this )
Also Read this Docs, as it will help you understand what’s in many cases are required information, for people to understand, know what you have done etc.