note: I already did both, an English and Spanish edition of these in case you want to check those out. I do the lists thinking about people who like YouTube and are learning languages.
Learning Italian/about Italian culture:
Easy Italian: they teach about the technique and they also interview random people on the streets of Italy, which is perfect for you to hear different accents.
Learn Italian With Lucrezia: she teaches about technique but she also does vlogs where she breaks down Italian culture by showing her day to day.
I believe both have subtitles in various languages.
Commentary:
Psicologa Giada Sofia Ave: she's a psychologist. Particularly useful when learning the language because she speaks about a niche topic (more vocabulary to know) and also speaks very slow.
Persi in Corea: an Italian woman who used to live in Korea for years. She does videos breaking down Korean culture and compares it to Italy. How they both differ, their different takes on things, like social cues, dating, etc.
Geopop: all things science, geography, etc.
Vlogging:
ShantiLives.
Makeup:
Grace On Your Dash: makeup guru who happens to be a singer, hence, she has excellent pronunciation.
Vogue Italia: they do makeup videos as well as What's in My Bag videos, and it's useful because it prompts people to talk about their routine.
Cooking:
GialloZafferano.
Fatto in Casa per Voi.
Fatto in Casa da Benedetta.
(The last two are by the same woman).
ASMR:
AppleTingles ASMR: she gets very creative with the way she presents her videos. Also talks about various topics in a slow and relaxing manner.