The particular episode talked about things not to do in Spain. Here's the list.
1 Never turn up on time - the example they use in the video is a party. Spaniards do turn up on time for lots of things but the basic notion is good.
2 Never go to the shops between 2 and 5 in the afternoon. Again lots of town centre shops and supermarkets open in the afternoon but the basic premise is good
3 Don't start the "two kisses" (the cheek to cheek lip smacking greeting) from the wrong side. You need to start by moving your head to the left to brush right cheeks; otherwise expect a head butt or a full on the mouth kiss.
4 Don't try to eat in a restaurant outside the "traditional" times. That's probably between say 2 and 4 for lunch and after 8.30 (even that's a bit early) until some unspecified later time for dinner. You can get tapas, sandwiches etc. outside these times but these are the hours when the kitchen will be open. Actually I changed the times a bit because I think they used Catalan times (see point 8).
5 Never clear off as soon as you've finished eating with someone. If you're really in a hurry you can start apologising that you have to go as you drink the after meal coffee. Normally though the after meal chatting is an essential part of the meal
6 Don't read anything into the way you are greeted in a shop or bar. If you are called guapo or guapa for instance (handsome or beautiful) it's simply the same as someone in Liverpool calling you luv or someone in Nottingham thinking you're a duck.
7 Never pronounce an English word as though it were an English word. Every English language word has to be hispanised. This is absolutely true but the rules are incredibly complex about how the word should be tortured.
8 Don't generalise about Spain by which they mean that people from Andalucia have different ways to the people of Cataluña or Galicia. Whilst it's true I often wonder how we'd ever say anything if we weren't able to generalise.
Finally, point 9, don't shoot me. If you don't agree go to the video and make your comments there. I'm just repeating (more or less) what the young women in the video said.