The quality is a little low and difficult to watch in a few parts. The use of background removal, cut in with the palm trees is a bit jarring, and it's obvious that you're reading a script. The whispering is really weird and a little creepy.
The whole video is a little long for an ad. Try to keep it under a minute to keep your customer's attention. In that regard, I recommend getting into the content quicker. I have to watch 20 seconds before you say anything about the actual game.
The photos don't need to be repeated at the end, as it just adds time for no added value.
The part at the end with Zelda told me more about how to play the game than the rest of the video. Tell me about rolling dice and matching them to the cards. Also tell me the valuable skills I'll be teaching my 2-year-old. Those are the things that make this game unique and interesting to parents, which I assume is your target demographic.
I wouldn't bother trying to appeal to gamers, honestly. "Serious gamers" as you say, will not particularly be interested in cutesy animals and matching colors. Instead, market this as a game that grows with your family, starting as color-matching for the younger ones, and moving on to variable abilities and more strategic choices for the slightly older kids.
All that being said, this is not the spot for an almost 40-minutes video. This page is better as an advertisement and a shop than a how-to spot. Add your game to the boardgamegeek.com database, and put info on how to play it there. This video would be perfect for that platform, or put it on your publisher website. It's too long and involved here.
I would also recommend scripting this more, and instead of showing a whole game, and just waiting until the thing that you want to talk about happens naturally, teach the game by demo. Stack the deck and simulate the rolls to get to talk about what's important. Check out Rodney Smith's videos for the pinnacle example of a how-to-play video.
The word from the designer video is unnecessary. Put what you said in the text, and that would be better, especially because you already have two other videos on this page.