I would only throw my few cents here.
Not commenting design
@Rafael Najmanovich - you should try to practice what you want to say couple of time before you record the video, its hard to watch if you read the text froim behind the camera, its clearly visible and judjing your knowledge. Also i found hard to follow you, please make clear sentence, from start to beginning not just sort of random words.
Im bicycle coach, whatever i say to people it comes from expirience, i dont need to think about it at all, it just a knowledge i have and use in conversation.
Please think about it before you record next video.
Best of Luck!