If there was one video in the black metal that I would recommend to you it would be Haavad Uulitsal by Loits. Its simply unique, dark and haunting. Its a great song and video together. Loits have some other great black metal songs too like Vanade Leegionaride Laul. They have a music video out full of great black metal tracks and videos. Their latest effort was out in 2012 but they have been around for two decades spewing out releases with EPs and three full lengths. It seems like you can get their CDs and Vinyls directly through Flank N Roll Records which seems to be the band owned label. The band hails from Estonia.