This is The Elder Scrolls: Skyblivion, a project aiming to bring the Elder Scrolls IV: Oblivion to a new generation of players! Skyblivion plans to feature all of Cyrodiil, alongside all of its quests, characters, and more. In this video, you'll be able to see some Skyblivion gameplay and a full quest in action, using The Elder Scrolls Skyblivion mod.
Want to learn more about this amazing project? Make sure to click on this link to visit their website https://skyblivion.com/ or you can read our interview with them over on IGN https://www.ign.com/articles/skyblivion-oblivion-skyrim-mod-elder-scrolls