https://www.youtube.com/watch?v=8EYYbwEqDlg
What a terrific version of Be Thou My Vision -- thanks for posting it. The tune is also called "Slane", after the hill where St. Patrick drove out the snakes. It was only translated into English around 100 years ago. We used it at my Irish cousin's funeral, along with reciting the Lorica (St. Patrick's Breastplate) around a circle.
Slane Castle, County Meath, built on the Hill of Slane. In an early on attempt to convert pagan Ireland to Christianity, St. Patrick lit a bonfire upon the Hill of Slane on Easter eve in the year 433 A.D., which coincided with the Druid revelries marking Equinox at the Royal seat of power on the nearby Hill of Tara. The High King of Ireland, Laoghaire (pronounced Leary), had outlawed any other visible fires when the pagan festival fires blazed at Tara. Patrick's daring to light a fire was as if declaring war. It was a turning point that began to change Ireland from a pagan land to the most Christian nation of Europe until this day. Muirchú, a 7th-century Irish historian, wrote that Logaire was so impressed by Patrick’s devotion that, despite Patrick's defiance (or perhaps because of it), he allowed Patrick continue his Christian missionary work in Ireland.
Here's another song, maybe more Christopop than hymn, but I offer it for your enjoyment. Get ready:
After the Last Tear Falls by Andrew Peterson