Hildegard von Blingin’ has one of the best channels on YouTube. We bet you never knew you needed medieval-style covers of songs like “Jolene” and “Somebody That I Used to Know,” but trust us, you do.

Forbes contributors publish independent expert analyses and insights. Hugh McIntyre covers music, with a focus on the global charts. Lana Del Rey’s “Summertime Sadness” returns to the U.K.’s Official ...