I dunno, but I would be a little skeptical of anyone who voluntarily confesses on youtube to a crime with no statute of limitations.
Your thinking is backwards. You’re skeptical of someone BECAUSE he confesses?
I would wonder more why he is NOT being investigated - after confessing to crimes with no statute of limitations.
You would think the police would be anxious to talk to him.
He says so right in the video that he knows there is no statute of limitations and says he would cooperate in any investigation.
Why are they not beating a pathway to his door to question him about unsolved murders?