Quote - texture_coordinate (generated) -> mapping (vector) -> environment_texture (color) -> background -> world_output

Mapping node:

Vector button ticked
Scale: x:0.5 / y:0.5 / z:5.0 

 

Thanks, tried, but all the same. Even on Textured preview, as attached.

Btw, strange there are two places to choose the *.hdr: in the World panel and in the Environment Texture node. I used either World panel (as in teh tute) or both... Doesn`t make sense as for me...