Yeah BnM I know they have that. It's pretty tight, but it lacks the simplicity of use. It works great in the comments section, where you already watched or are watching the video.
I was something much more streamlined. Like a little turtle on top of the first word of your referencing quote. If it were a video, it would stretch out and play the video while another turtle walks on the words. If it were just sound, the turtle would mosey along the words while they are said. Plus that way it would be perfectly non-obtrusive. If there's on thing I hate it's pop ups or pop outs in a different tab. I also dislike seeing a big youtube video smack dab in my screen. If I'm done with the video, why can't it disappear?
Matter of fact, it be cool if you could click the turtle shell and he popped out and belched out the quote. And if you clicked him again, he would suck it all back in and hide in his shell. It would make spoilers that much more entertaining.