So far this is what I've been working on:
To start off I looked at it as it was, taking out the obvious clues.
Then I started searching the HTML code for clues, none found.
I looked through the comment and saw Devms regarding the underlines.
I noticed 2 were uneven so I started trying different combinations of binary code, but it ended up with random symbols and weird letters. I then thought it might have something to do with a gridded numbersystem, but couldn't make anything reasonable from that.
I noticed the underlines had been rearranged and cut down in the clue you gave us which made me think in colour codes, but without luck.
I started looking "inbetween" the lines and search for hidden letters there like for example:
notice how there's a letter right above the space, so thise line would make:
e a e e d " " i o
there is a message hidden in this
post.
____ ___ __ ____ ___ __ ____ ___ __ ____ ___ __
If you
manage to solve the riddle,
Contact me.
This ended up as gibberish as well.
As I kept digging for answers I tried to search for help, I received a small hint (unintentional or not it helped me, I hope)
The hint I will not say, but let's just say I took a break and tried to wipe the board clean and start on a fresh.
While I was trying to solve this it hit me this might be an anagram, so I took the highlighted
Individual letters and the results I got was:
c f a t h e p s o o
p h o t o f a c e s
I noticed in your clue that you had made a hyphen, so I thought that might be of importance
I dug around and found this:
Again, the number 12 comes up as in the 12th episode. I notice Laa-Laa and Tinky-Winky are written with hyphens.
I'm thinking that somehow, these letters combined with the underlines will make a message or a clue to find the answer to the riddle.
I hope you guys could use this information, if not sorry for wasting your time.