To add a video for Jón Þórarinsson / Blástjarnan þó skarti skær (The Blue and Brightly Shining Star), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Jón Þórarinsson / Blástjarnan þó skarti skær (The Blue and Brightly Shining Star)