[Solution] I have hidden something...

...In something hidden. Just for kicks.

Thought I'd let you know.

Hint #1
Hint #2
Hint #3

Solution

The ItsTooHard link was hidden in the source code of my contribution to The Ultimate Fortix Giveaway. Something hidden referred to my private giveaway. The other something hidden was of course the link itself.

The quiz consisted of a single question, embedded as a Youtube video. It contained a series of phrases in several different languages, pasted over a nice loop. These phrases are actually the recorded greetings that were thrown into space in 1977, aboard Voyager spacecrafts. The answer was the name used to refer to the records on Wikipedia.

Afterwards I added a bonus quiz, the answer to which was any of the languages I used in the "song".

Trivia: The single dot, used as the background image of the Youtube video means "greetings" in Tralfamadorian.

Post Mortem

During the course of this, I posted some hints, bumped the other thread simultaneously with this one and ultimately revealed the link but still, finding the entrance proved to be harder than the actual puzzle. Which is a shame because I wanted more people to have a go at it. The puzzle itself turned out to be quite easy with a success rate greater than 50%.

As apologies for frustration caused, I decided to make another giveaway. Apparently, mind reading puzzles are all the rage nowadays, so I hopped on the bandwagon with something that occurred to me spontaneously a little while back. So good luck with the consolation prize.

Oh before I forget, the hints in advance:

1. Be agreeable.
2. Punctuation is important.