Spoilers galore, for both seasons if I recall correctly. Will make little to no sense if you haven’t sen LOST itself.
I’m not refunding for any soda / keyboard / monitor mishaps that may occur.
Since I’m not a Lost fan, that didn’t really do anything for me. Although I did enjoy the animation style, the end gag, and the Trogdor cameo.
This video is much weirder (a requisite for Al), and should entertain Lost fans and virgins (like me) alike. Flashback Dance Party!
Very impressive, in that the lyrics and visuals seem to match quite acutely if you understand the various narrative threads from the show. Good job (and I imagine quite a lot of work going through the DVDs)! 
I like the Discworld and Nowhere Man references.
Brian