The blueprint didn’t compile for me because of missing reset VR orientation and position function (had to delete it, not sure what is the right replacement).
Also camera horizontal rotation didn’t work because of outdated events. Replacing InputAxis Turn/TurnRate with InputAxis TirnRight/TurnRightRate fixed the issue. Here is the graph (you can delete the nodes with the warning - I kept them only for reference).
UPDATE: The camera rotation issue is actually solved in the next video and the solution is exactly the same.