I pray to Jesus daily. Or I think I do anyways.
I pray a lot most days. But I'm scared that I'm praising the wrong Lord. How can I know what Jesus really sounds like? How will I know what it sounds like?
I don't want to go to Hell because I was praising the wrong God. I really don't. I don't.
Matthew 10:16 says, "Behold, I am sending you our as sheep in the midst of wolves, so be wise as serpents and innocent as doves."
It strikes me that this man is neither wise nor innocent, rather he comes across as the wolf not a sheep.
You need to read what the BIBLE actually says about the antichrist, because this person certainly hasn't. First of all the antichrist is referred to only three times (1 John and 2 John) and two of those refer to a physical person.
The third is a comparison. So 1 John 4 says, "By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God and every spirit that does not confess Jesus is not from God.
This is the spirit of the antichrist..."
So if you confess that Jesus came to Earth physically, then you have nothing to worry about, certainly not that you have an antichrist in your mind.
You should also consider other things this guy is saying in their true light. He says 'Most brothers and sisters in the Lord are deceived.' If that is true, then there is a good chance that HE is the one who deceived.
He also tells you to avoid the media... but he uses the media (YouTube) to get across his ideas.
I would say, just based on this that HE is a false prophet and teacher and will have to face judgement on day.
In the meantime, as others have said, you need to read the Bible that is how you will get to know the truth from falsehood... wherever you find it.
Don't worry about what the voice in your head sounds like, what is more important is what it is telling you and if it is telling you something that is not in the Bible, then you will need to talk to someone wiser with experience (church leader is my advice), but it is not going to be the antichrist EVER!