Yes, it is a scam. You pay them $300 and they send you instructions on how to build a website and sell instructions for $300.
Really? I didn't manage to watch the videos that far.
However, this sounds somewhat recursive.
It's the modern day version of the newspaper scam.
You read an ad saying Get rich! Send $10 for full details to xxxxx
You send in $10
You get a photocopied page saying Put ads in the paper that read "Get rich! Send $10 for full details to xxxxx"
Been going on for decades.