I've already posted this song, but the link I posted is dead now. There's another one where it's still available, but someone just uploaded a YouTube video with the name of the song in Assamese script. They even included information about which movie the song is from, who the singers are, and who the lyricist is! This is my favorite song in Assamese so far.
https://www.youtube.com/watch?v=tif_AMfRqNEAnd this is "Mon Posuwar Ba" by Sabita Chowdhury, which I also posted another link to:
https://www.youtube.com/watch?v=zouxn6kkDVc