Those places are great for 3D printing, but not really for blender stuff. Blender CAN do 3D printing, and manifold, watertight meshes, but it's usually used for stuff far more '3d rendering' than that.

Here is an alternative Piped link(s):

https://piped.video/7iM3_Jskk44?si=Up4T05RYLvsKft0A

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source; check me out at GitHub.