If you're going for viral, think the impossible, or the super cool-- impossible is better, so you don't have too many people ripping you off and so it creates a lot of buzz.
You'll have a lot of options this way, since you can make it look like amateur footage (which it'll probably be anyway) and you can have more freedom to play with concepts and ways to 'cheat' to make it happen.
Make sure your video can be summarized in one sentence. Here's some ideas, take em and see what you can do with them, and come up with your own too:
"UFO CRASHES INTO BACKYARD."
"ME TRAMPOLINING OVER MY HOUSE INTO THE POOL."
"CATCHING A BASEBALL WITH CHOPSTICKS."
"JEFF DRIVING TO WENDY'S BLINDFOLDED AND ORDERING!!"
"SODA EXPLODES WHEN SAM STARES AT IT!"
Etc etc. It's easy to come up with them. And of course, at the end of each one, or in the middle even, be sure to plug LTL.
It can be blatant, like "See the rest of the videos at LuxLivinOnline.com." or it could even be subtle like a voice in the background going "Holy shit that's PHENOMENAL!" and laughing as the camera pans over and catches a glimpse of the LTL logo on a sticker.
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Here are some examples of superb viral videos:
The Super Chameleon:
https://www.youtube.com/watch?v=KMT1FLzEn9IBruce Lee plays ping pong with nunchucks:
https://www.youtube.com/watch?v=L3qogsCzk6oCatch Sunglasses On Your Face:
https://www.youtube.com/watch?v=-prfAENSh2k---------------------
All three are viral ads, the first and third for RayBans, and the second for Nokia. In the first one, you manage to catch a glimpse of the RayBan slogan "Never Hide" really quick as the camera 'accidentally' jars to the left. Clever.
Anyhow, good luck with your attempt to viralize LTL. <3