The movie above starts from the lyrics part.
If you move the red dot to the left on the play bar, you can hear the piano and drum performance.
Lyrics Harumi Huuki/ Translation into Okinawa Dialect：Annna Sato. (2018) Theme song of Sego Don Vocal and Piano Version. Avex CLASSICS.
Stand up as a matured person
and fly into the future,
keeping back tears,
holding feelings of the dead
and shouting out
in order to let this world be filled with love.
※There seems to be no official translation of the lyrics, so the translation above is done by Beelationship.
引用：【西郷どん】タイトルバックの唄に詩がついた 歌唱は里アンナ ［Accessed 24 December 2020］.
【You Tube】西郷どん紀行 里アンナ 奄美シマ唄 2018/10/21 anna sato amami ［Accessed 24 December 2020］.
What is Sego Don?