The orthography for both of those songs suggests they're in Tundra Yukaghir.
Btw, I posted one song in Nanai
last year and another in Forest/Kolyma/Southern Yukaghir
, if you're interested.
This song, however, is in Nomatsiguenga, an Arawakan language in the Campan branch spoken in the Peruvian Amazon. One of my colleagues in grad school works on this language, or at least was working on it when I last saw and heard from her. Another tried to work on this language with her when she was first starting out, but they didn't have much success that time. This is a lullaby in Nomatsiguenga called "Kajiro Chomonte," apparently meaning 'fat little termite'.
The lyrics are written in Roman script with subtitles in Spanish:https://www.youtube.com/watch?v=ENZVYkrXqM8