Congrats on making the sacrifice to build something, and then following through to releasing this first public version. You will likely do quite well.
I would suggest, if I may, that you are going to get a lot of people dismissing your product, both now and in the future. If this is your first time being in the seat of both the creator and the public face for something you've worked so hard for, it's going to feel uncomfortable, and you will want to be defensive about their comments -- it won't seem justified that someone could make what feels like a low-effort, flippant comment about something you put so much time into.
In general it will be better to let it slide. They were not going to be your customers anyway. Lots of people will misunderstand who your target customer is. Power-users will say "why would I use this?" Or people who don't need any videos will say "there is no market for this." It doesn't matter, so long as people who are your target market see the value in it.
But more importantly, focusing on dismissive comments will take a psychological toll on you. You'll be sitting at dinner and feel angry about the jerk on the forum who said your work had no value. You've done great work, and letting those comments gnaw on you may make you doubt yourself, or think less of what you've built.
It's OK that not everyone sees the value in your product, nor should they: it just means you intelligently defined who you're going after. And that's great.
It'll take some practice and time to not feel the sting of negative comments, and the desire to argue with them -- to prove them wrong. See if you can be aware of your own emotions about them, and why they make you feel the way they do. As you do, you'll become fairly immune to it, and it'll help you truly enjoy the fruits of your entrepreneurial labor. This is a normal experience a lot of people go through.
Congrats again on a fantastic release, and for the dedication to give up so much to make this happen.