The resolution is High Definition (1280 x 720 pixels).
You can stream the entire series officially on Netflix . Note that Netflix canceled the series after the second season, meaning this episode is part of the final arc of the show. Shadow.and.Bone.S02E06.720p.10bit.WEBRip.2CH.x2...
Alina and Mal continue their search for the third amplifier, the elusive Firebird, leading to a massive revelation about Mal’s true identity and ancestry. The resolution is High Definition (1280 x 720 pixels)
Based on the naming convention in your query, here is what those technical tags mean: the elusive Firebird