Not a solution to puzzle. but I found it interesting enough to post.
Considering Text to be OPIJOIJ MNOIMMO : AMWDOAM
I did a ROT-12 that translates to this :
ABUVAUV YZAUYYA : MYIPAMY
That gave me nothing. But I considered it one word rather than three to make it :
ABUVAUVYZAUYYA : MYIPAMY
Then, If we translate the word before colons, Google Translate for ALL LETTERS in CAPS shows this :
and for ALL LETTERS in UNDERCAPS shows this :
in the future
So, Google translate shows both of them to be
shona language and I'll go with what undercaps shows. Though I cannot relate it with video in any way. Sorry about that.