The YouTube embeds in the early posts of the Videogame Music Thread
are invisible; you can see them if you do a full content quote of the early posts, many of which just look like empty posts.
And it explains why for instance in the OP @Gorblax said the rule for the thread was that every post had to have a piece of your favorite music–but then apparently didn’t post one himself in that post. But he did, it just isn’t visible now.