Both moose and elk can be found in Rocky Mountain NP. Elk (the one in your video that crossing the street) usually in group, but moose often can be found alone or just a couple of them. I have seen elk almost every state, but moose can only be found along rocky mountain (such as yellowstone, glacier, Banff, Jasper, waterton lake), Alaska, Maine... but I have seeing more moose in Rocky Mountain NP than anywhere else.