According to Mark 3:29 in the Holy Bible, "Whoever blasphemes against the Holy Spirit will never be forgiven; he is guilty of an eternal sin." Jesus will forgive you for just about anything, but he won't forgive you for denying the existence of the Holy Spirit. Ever. This is a one-way road you're taking here.
The actual context for this verse is that Yeshua, the Rebbe from Nazareth, was working obvious miracles of driving demonic spirits out of people. Some of the eyewitnesses in the entourage said that Yeshua was driving out spirits, not by the power of God, but by the power of Satan, i.e. calling the Holy Spirit an unclean, satanic spirit. That is the blasphemy of the Holy Spirit that Yeshua said would never find forgiveness, not denying the existence of the Holy Spirit. In fact there are comments in the Talmud that Yeshua did indeed work miracles, though the charge again is not by the power of Hashem, but rather by secret arts. So, from jurisprudence, when opponents testify of the same thing about an issue, there is high likelihood for that particular matter to be true, i.e. that Yeshua really did perform outstanding miracles.
Nevertheless, it is also clear that those who consistently refuse to seek God will likewise receive everlasting separation from God's beneficence whether they’re a YouTube blasphemy star or not.
Tempted to blaspheme?
I knew a fellow from DFW who at age 18 had professed faith in Christ. He joined the Army, was sent to Europe, met a fräulein and married her. She was a Satanist and persuaded him to blaspheme Christ and acknowledge Satan as lord. Within a few months he was given a medical discharge from the Army, 90% permanent disability, for attempting suicide and other psychotic behavior. I became acquainted with the fellow about 12 years after that. Though usually lucid and conversant the fellow was still suffering even though under treatment, tormented by continual voices and bizarre spells. He said he wanted to find a way to get right with God and be healed from tormenting demonic spirits. One evening while in conversation he started acting bizarre. I began to exorcise spirits. At one point he lunged at me, his face about three inches from my face and contorted grotesquely, and a low raspy voice growled, "You'll never get him, he's mine!" Yes, it really happened. I have to say that even with previous spiritual experiences this particular event was profound. A friend of mine who also knew of the fellow's situation later joined me and we continued to exorcise spirits. During the session both of us saw strange, fleeting black swirls in the air around the fellow's head many times. Our session ended that evening without final success. During all the time that I knew the tormented fellow he could never decide that he would renounce his vows to Satan, even while lucid, and he remained tormented.
I recommend not playing around with or promoting blasphemy even if you think it all a bunch of bunk. I would recommend carefully reconsidering the worldview of the Bible.