Context for 1:26, 2:45, and 4:34: They introduced a proverb which meant "Even though it's ordinary, you talk of [something] as if you're doing something special" according the mitsu subs
PART 2: Hanae Natsuki being Hanae Natsuki Part 2 https://youtu.be/3_FojZNThNk
Videos in order of appearance
Speaking English - https://www.youtube.com/watch?v=i8p3Dl4xe9Y
Drunk - https://www.youtube.com/watch?v=TXRToYGEC8w&t=6s
Weird Accent - https://www.youtube.com/watch?v=l6mQzrmJ57E
116 Yen - https://www.youtube.com/watch?v=AqZLvbsAjKU
The one I needed to give context for lol - https://www.youtube.com/watch?v=7SHLrtOjUXc&t=28s
His laugh - https://www.youtube.com/watch?v=TGGMnWHQUtg
Glasses - https://www.youtube.com/watch?v=dj-BzhJTNQk&t=1s
Zenitsu's Creepy Laugh - https://www.youtube.com/watch?v=Td36wRHgHjY
Age Gap - https://www.youtube.com/watch?v=pX91QvXM2wA&t=131s
Nezuko Trend - https://www.youtube.com/watch?v=8EmnXEmvvAA
Nezukooooo - https://www.youtube.com/watch?v=qnmUY4vQqnc
Dummy Head Mic - https://www.youtube.com/watch?v=1vgovS3Hqug
Hanae Natsuki's Social Media
YouTube (most videos are subbed in multiple languages including English) - https://www.youtube.com/channel/UC3C3YOGFjn7Pq3lOCeUFHfg
Twitter (which to be honest won't give a very good translation) - https://twitter.com/hanae0626