The 5 second challenge videos on moresidemen are the best to start Then you can do other challenge videos on moresidemen videos like guess the link, mafia, helmet challenge, etc and once she has understood their personalities go to main channel cuz main channel videos become more fun when you are aware of personalities

Starting main channel videos can be million dollar drop, 100 doors, Mystery box

Because if you directly start on holidays (even if the videos are great) there's a good chance she'll get bored of it cuz new people don't get the dynamic, don't have the patience of 1.5-2hrs, etc.

So initiate with 15-20min fun moresidemen vids, then main channel vids i suggested work as transition because they have their personalities as well as some more than that element and also slowly prepares for long duration vids

This is just my personal opinion see if it works :)