I saw a lot of tech and science channel in the comments so to balance that out, here are some of my favourite crafting channels:

North of the border: creates a clay sculpture every week. Generally it is something nerdy or something cursed

Enchanterium: repaint dolls, often to popular characters. They also sew their own outfits. A lot of fun even if you're not interested in dolls

Nerdforge: create a lot of crazy projects, mostly related to nerdy stuff. (Last project was a 2m booknook)

Wicked makers: create decorations and animatronics for Halloween

Florian Gadsby: very talented potter with very relaxing voice and videos

Pottery to the people: pottery videos, often trying new experiments

Evan and Katelyn: videos on stuff that they build. Always a lot of fun (last video: how they built an ergonomic laptop)

TL Yarn Crafts: crochet videos

Kaypea Creations: making of art dolls (animals), either out of clay or fake fur.

Studson Studios: creates amazing sculptures out of mostly trash. Amazing channel, one of my favourites

Make strange things: makes strange things. Small channel but greatly appreciated

Boylei hobby time: creates dioramas

Lightning cosplay: creats amazing cosplays

Transcended furniture gallery: restores vintage furniture

Bonus: Half-Asleep Chris: videos with stop motion elements, mostly about cats and/or lego