i tried all the methods to get vdeocipher decryption keys can anyone help me on this

PSSH:-AAAAUnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAADIiKnZkb2 NpcGhlcjo3MjYzNjcyMDZkMzI0ZGU3ODFkNjliMWE1ZTYwNGRh YUjj3JWbBg==

license:-https://license.vdocipher.com/auth

i tried but still not able to get any keys can anyone help on this???