You probably need to connect View Direction to the Negate node first, then connect Negate to the Cubemap

Cubemap[DIR] <-- Negate <-- View Direction

No, use the UV output instead of U and V :)

Also, set your shader to unlit and use only Emission - Diffuse is for things that should receive light from light sources :)

Cubemaps are sampled by the view reflection direction by default. Connect a Negate node into DIR of the cubemap, and then connect a View Direction node into the Negate node

Multiply the UVs by a value, such as 2 to make it tile twice, 0.5 to stretch it. Use a Vector2 to scale it differently on the U and V axes

Haha, no probs <3

This has now been implemented in Beta 0.26 :)