You have to enter nothing but the code. If you come to the Youtube page by following a link in there, it will have a feature=related part in the URL and AFAIK the code is the one from the previous video you watched. The real code of the video can be found at the top right of the page, it's bMnl1URCH3w in your case.
Try it by editing your post or have a look by pressing the reply button of another posting
I'm amazed that no one has mentioned Moonlight Sonata. For me, a total newbie in music theory etc., this piece sure is epic. Sure, it doesn't bring about any feelings of grandeur per se, but it's such a sad and also beautiful piece of art that it moves me everytime I hear it.
Seeing as nobody else has mentioned him, I have to highlight Bear McCreary's work on Battlestar Galactica. His score is absolutely superb and performed in symphonies at opera houses. Here are a few of my favourites -
The Shape of Things to Come
Prelude to War
Other pieces, such as The Storming of New Caprica and All Along the Watchtower, need to be seen in context to really see just how epic they are. And yes, Bear McCreary's version of All Along the Watchtower is truly epic given that it's on a galactic scale.
Been listening to my friend perform Beethoven's symphonies, EXTREMELY impressive. And also some Organ pieces, which I'll get the name for soon. I hate the Organ but when he plays them on the piano they are pretty damn impressive.
My favourite pieces include Nocturne (op9, might be) and Claire De Lune. The first one has sentimental value, they aren't that 'impressive' though.
Edit: My fault. I got lost along the way and was just writing about my favourite pieces. Perhaps all of the pieces I said would be better fitting in the melancholic section. Beethoven's symphonies on the other hand, ouch, you should watch them being played.