Finding verified sources to download Mongolian Zohioliin Duu
YouTube is the most popular platform for Mongolian music videos. YouTube Music Premium allows verified downloads.
It looks like you are looking for a safe and verified way to download Mongolian songs ("дуу татах").
Many independent Mongolian artists sell their music on Bandcamp.
No. YouTube’s terms of service forbid downloading via rippers like ytmp3.cc. Those are unverified and often contain malware.