You are right, and there will be a second one directed at existing bitcoin holders, but think about the following:
1. We would have to divide the existing Bitcoin holders in two groups, a) BTC holders that don't know about Dash and b) BTC holders that already know about Dash but are not investing in it for their own reasons.
If group A, BTC holders that don't know about Dash, see our video somewhere around the Internet, it wont tell them much about the underlying technology but if they are interested they would know how to find more information about it and how to get coins.
On the other hand, If group B, BTC holders that already know about Dash, see our newbie introductory video, the video itself won't tell them much. But if they see our video is being published in different places around the Internet and that we are reaching a new audience, they may invest in Dash not because the video is telling them anything they did not know already but because they may like our approach to the market and invest in the fact that we are trying to attract new investment into the ecosystem.
2. The video being an introductory basic video can reach a broader audience but it will be our job to get it out there. My idea to do a formal press release with the video directed at traditional media publications. There are several press outlets that provide this type of service, so that we can reach media publications that traditionally don't report a lot on crypto but that may have marginal understanding of what Bitcoin is and may find it to be something interesting they can publish. If the video was too technical it would be unattractive to them and it would be constraint only to the crypto sphere. If we do this I firmly believe it would be the most effective combination.
The conclusion is that this marketing approach of reaching out to non crypto users will accomplish two things: 1. Truly inform new people that know nothing about crypto at a level they can understand and attract them directly into Dash. 2. Entice existing BTC holders to invest in Dash, not because the video is informing them but because they can see the team has the right vision and the project may grow from our efforts, so maybe that is a project they want to invest in.
As you can see this is the best balance when you consider pros and cons, and that is why we are going with this approach first. Later we can create a more technical one directed at a more crypto educated audience.