The first thing that comes to mind, is that she- and her mother, who testifies of her death, are not dressed very modestly at all (Just look at how the children of Fatima were dressed). The mother makes it clear that they are not members of a traditional Catholic Church, but of some kind of charismatic movement, although it is hard to know if it is a protestant or some kind of Novus Ordo branch.. So they are fasting and praying, and the daughter receives "supernatural" knowledge of her soon-coming death, and although she tells no one but God, this is also confirmed by a visiting "servant of God." Before this, the daughter admits that she has strayed away into a sinful life, and so she could easily have been exposed to demons, and they could still be with her if she has not confessed her sins sacramentally. Demons could have heard her talking to God, and they could also have put ideas into her mind of what signs to ask for, as well as into the mind of the visiting "servant of God."
The vision itself sounds very conservative and convincing, but there are things that "give her away." For example, she uses a very protestant term when she claimes that Jesus, while showing hell to her, starts crying because He "loves the sinner but hates the sin." This is not Catholic doctrine at all. God would never throw someone He loves into hell, you can not separate the two things. The Bible is clear in many places that God hates the sinner as well, not just the sin. This does not contradict the fact that He loved the world so much that He gave His life for sinners. God loves a contrite heart, but not an obstinate sinner.
A nother thing that contradicts generosity, is the fact that the girl, before dying, decides to give away all her things. But..she tells her friends that if she comes back, she want's them to give it all back to her. This does not sound like an act of charity, and it just makes her testimony less believable. Also, her mother and other laymen are annointing her with oil before she dies. It does not seem like a good thing to do, instead of having a priest give her the last sacraments. Her testimony on youtube goes on for an hour and a half, and she describes how people are suffering in hell for all kinds of sins. There are demons, worms, blasphemies, flames, sulfer, JP II, Michael Jackson and some other singer..even children condemned to hell for disobeying their parents. It all sounds very traditional and scary. And you keep wondering what the agenda really is, if this is of satan. But then, in the end, the heresies build up.
The worst heresy is when she comes to Heaven and Mary, the Mother of God is being shown to her. "Jesus" explains to the girl how "Mary, as well as the other Saints, are completely without knowledge about what's going on down on earth. And the people who venerate them and turn to them for help are IDOLATORS.." She also mentiones the "rapture" very breefly, and claimes that babies in their mothers wombs are being rushed up to heaven, leaving the mothers with empty bellies. This is a terrible rejection of original sin and the necessity of waterbaptism for salvation. This kind of rapture is also a protestant idea, not based on Tradition. She concludes by saying that there will be a time on earth when the Holy Spirit will not be present on earth at all. This also goes against Jesus promises to the Church that His Spirit will guide the Church, and that this Church will stand against the gates of hell unto the end of time. This is not possible for the Church if there is no Holy Spirit around to help. So this revelation is very evil. It should not be used as evidence for sedevacantism and it should not be published on Traditional websites. A revelation that leads people away from the Mother of God is the last thing that the Church needs in these evil times. It just shows how evil and deceiving the devil is, and that even the elect could be deceived. Watch and pray.