I sell a lot of Legos on eBay. I am the biggest seller of Lego sets as far as I know. I recently found that I am able to get some of my eBay customers to my YouTube page. Currently I am able to pull about 150 views per day to YouTube but this is reliably increasing by about 3 views per day as I steadily grow the size of my store, so a few months from now this will be 500 views per day and by the end of next year it may very well be 1,000 or 1,500 or 5,000 views per day.
Currently all that we do is "process" Lego sets and post them online, but we want to start doing some more brandable and creative activities. This would look something like having a subscription box where we would design a unique set out of Legos every month and then ship that set with our instructions to all of our customers. This would also look like custom prints and patterns on Lego parts, unique accessories, etc. I would like to have this all be done by creating a brand similar to booster bricks which hosts regular livestreams on facebook and does custom builds, behind the scenes videos, etc.
In general, I think the brand should be like a party that everyone wants to be a part of because it is fun, creative, exciting, exclusive, and so on. The issue is that we are starting with nothing but Legos and a regular audience which is targeted but not necessarily interested yet, so we will need to hook them into our "party" and get them to check out some additional videos on our channel. We will need some good content, hopefully some regularly recurring series as well as some random videos that we can make in hopes of going viral. However, what I am most concerned with right now is the initial hook. If we are able to capture our potential customer's attention for say 15 seconds what are the most important things to do in order to get them engaged quickly?