11:49 - BlackEssence Summoning have a lot of dungeon synth in their work. Basically, they're playing black metal but with hard dungeon synth elements.
11:45 - BlackEssence Dungeon synth is basically atmospheric/epic black metal without guitars and vocals. Usually thoose are lofi tracks played on some synths and keyboards. Chech Arath, BUrzums Duadi Baldrs and Hliðskjálf, Erang, Lord Lovidicus and So
What are all those instruments that Skyforger have? There are a lot of different ones there.
They performed two shows at the festival, a metal show in support of their new album Kurbads and an entirely acoustic show which is pictured above. I'm not really familiar with their armamentarium, but my guess would be that the instrument in picture 14990 is a ģīga and the one in 14992 is a kokle. The other instruments should be some varieties of tambourines, pipes and drums.