Welcome aboard the Indiedev express!
I thought your Youtube video had some nice footage (cityscape, gameplay, etc). From what I understood, you are trying to make a game like Mario Run with features like wall-slide and time trials. If I were you, I would focus less on explaining more and just keep it short and simple. Videos under 5 minutes are fine.
Your English pronunciation was not bad at all. If you speak louder it will be even easier to understand your words.