If you want some friendly advice: 1) Fix the audio on all vids. It is so important and will keep viewers away more than almost anything else. 2) There is no need to comment or have your face on the screen. Let the professionals do their job. If you want to do an intro and a summation, that's fine. You will get the subs if you give your viewers a clean, uninterrupted viewing experience.
If you want some friendly advice: 1) Fix the audio on all vids. It is so important and will keep viewers away more than almost anything else. 2) There is no need to comment or have your face on the screen. Let the professionals do their job. If you want to do an intro and a summation, that's fine. You will get the subs if you give your viewers a clean, uninterrupted viewing experience.