Dear Young:

You are not responsible, and no sin happens, if you see something that you did not intend to see, as long as you did not act upon it and immediately went to a different page on the Internet.

I am somewhat confused, however. You state, "i into a porn page and a video come out not the one i am searching for." Perhaps this is a language issue, but this statement implies that you were looking at porn, it is just this one video was not the porn you were looking for.

To deliberately look at any kind of pornography is grave sin that must be confessed. The Cathecism states:

2354 Pornography consists in removing real or simulated sexual acts from the intimacy of the partners, in order to display them deliberately to third parties. It offends against chastity because it perverts the conjugal act, the intimate giving of spouses to each other. It does grave injury to the dignity of its participants (actors, vendors, the public), since each one becomes an object of base pleasure and illicit profit for others. It immerses all who are involved in the illusion of a fantasy world. It is a grave offense. Civil authorities should prevent the production and distribution of pornographic materials.

I hope this anwers your question.

God Bless,
Bro. Ignatius Mary