Thanks Michael. Your comment has been the only really useful one I have gotten anywhere so far to be honest. It gave me a new perspective on what kind of trailer I might make.
I did look at numerous trailers for adventure games on Steam, and even modeled the one above closely after one of them in particular. However, I hadn't thought of looking at Telltale games trailers even though I am a fan of their work. One thing that Telltales Games has that I do not have is a large following already in existence, and because they only make games based on existing IPs, they have that following as well, so they basically always have a built-in guaranteed audience for their games. Their trailers need not show very much about what the game will be like, because everyone already knows. Their trailers are basically just reminders about the game for people who already plan to buy it. Also my games do actually have a game to play while Telltale really just makes minimally interactive stories.
That said, it is an interesting perspective to consider that maybe the most powerful trailer is not several short clips from the game as I have in my current trailer but actually a longer clip of only one scene. In that way the pacing and timing and real feel of the game can be portrayed. I think I'll probably make such a trailer and see what people think of it.
Thanks again