The two legends are the starting part of an animated film named "Ének a csodaszarvasról" (Song about the wondrous stag) by Marcell Jankovics. The film traces through the evolution of the early parts of Hungarian history. This means the two legends are most probably Khanty and Mansi legends.
The first legend is about the upper-world and lower-world gods.
The second legend is a bout the creation of plants and reindeers.