I have no idea what they are singing, but this is lovely.

A sea that lulls to rest (danish: et hav der vugger sig til ro)
Music: Matti Borg
Lyrics: Juliane Preisler
Arrangement: Michael Bojesen

Performed by the DR Danish National Girls’ Choir and their conductor Phillip Faber as part of the programme ‘Morgensang med Phillip Faber’ (morning song) on the main Danish public service-channel DR1, Danish Broadcasting Corporation.

A fifth of Denmark’s population has tuned-in to live sing-alongs hosted by state broadcaster DR. On 16 March, Danes woke up to their first day in self-isolation and the conductor Phillip Faber made a short broadcast from home via Facebook. From his own piano, Faber invited viewers to sing along to favourite songs from Denmark’s High School Song Book, Hymn Book and from classic films.
Read more about how singing together creates a community despite corona-isolation: https://www.dr.dk/om-dr/about-dr/broadcast-community-sing-along-gathers-danes-through-corona-isolation

Learn more about the DR Danish National Girls’ Choir here:
www.drpigekoret.dk
www.facebook/drpigekoret
Instagram: @dr.pigekoret