Problem statement:Research has shown that both positive and negative information can alter a neutral attitude towards an unknown person, with negative information having, in general, a larger impact. Though this positive-negative asymmetry has received considerable attention, it has, to our knowledge, not been tested in more current and powerful social media, such as youtube. Although attitudes are not fixed, literature on the reversal of a recently established attitude by providing counterattitudinal information is sparse. Therefore, the main aims of the present study were to examine positve-negative asymmetry in attitude formation using youtube fragments and to test the permanence of the establihed attitude by providing counter-attitudinal information. Approach: A total of 89 persons received either a positively (P) or a negatively (N) valued youtube fragment concerning a neutral target person. Subsequently, half of each group received positive written information (groups PP and NP) regarding the target person; the other half received negative written information (groups PN and NN). Results: The results indicate that it is indeed possible to change a neutral attitude using youtube fragments, with a larger attitude change after negative than positive material. Textual information reversed this attitude, with an equal effect for positive and negative information. Conclusion/Recommendations: It is possible to quickly change an attitude towards a neutral person using youtube fragments, this formed attitude can easily be reversed by providing textual counterattitudinal information. These findings can contribute to gaining a better understanding of the effect of modern social media on attitude formation and its transiency.