Is the speech the questioner heard within himself, to the effect that he will not enter Paradise after watching pornographic videos, a revelation from Allah, and does Allah speak to humans in a state of wakefulness by way of revelation and inspiration?

It is forbidden to look at the aforementioned websites, and one must strive against their lower self and stay away from them. What has been heard about the punishment for committing this sin might be from the whispers of Satan, because Paradise is not forbidden except for one who dies a polytheist, as Allah Almighty says: "Indeed, he who associates others with Allah - Allah has forbidden him Paradise, and his refuge is the Fire." As for the disobedient monotheist, their destiny is Paradise, according to the saying of the Prophet, peace and blessings be upon him: "He will be brought out of the Hellfire who said 'There is no god but Allah' and had in his heart goodness weighing a barley seed," and his saying: "No servant said 'There is no god but Allah' then died upon that except that he entered Paradise, even if he committed fornication and even if he stole." And the People of the Sunnah believe that those who commit major sins will not abide eternally in the Hellfire; even if they enter it, they will be brought out of it. Therefore, one should turn away from these whispers and strive against their lower self to lower their gaze.