Nothing feels as epic as going in blind, I agree - but it really only works if everyone else with you is ALREADY going in blind, or is aware and tolerant of the fact that you're going in blind. If it is difficult content, it will not take long for the group to figure out that you have no idea what you're doing. Best case scenario, they explain to you what is going on and what you need to do. Worst case? Verbal abuse and a kick.

In the first case - well, there goes your blindness. You've just had the fight explained to you. You're now in the same position as you would be if you watched the video, except you've wasted a bit of time for seven other people.

In the second case, you get to keep your blindness, but you're out a party, and possibly even blacklisted.

If content is more than a week old, it's best to either find like-minded folks who are willing to explore content blind with you (party finder works better than you think for this, especially early in the content's life; Free Company is another option, depending on how friendly the folks in your FC are), or bite the bullet and watch a vid so you at least know what's coming. There's no replacement for actual experience, this is true, but there's still a world of difference between, "Ah, so that's how that mechanic works," and "What the crap was that?"