Mongolian translation, what does the Mongolian recitation at the beginning of the white gown in the video mean?

Quote the lyrics of the song "Mongols" sung by Tengger singer. Transliteration in Latin alphabet is as follows:

Algarin Wu Tabour Gilsan

Marconi Gert tolson Bi

Atal Hull nutgaa 'olgii Mini gej Bode Dog.

Unasan ene nutgaa

Ooriin bye shig hairlaj

Ugaasan tungalag m'ornoo

Ehiin s'uu shig sanadag。

...

Ene h'un Mongolia h'un

Hello, Olundu Heltai!