Thanks for the video !
On a side note, I assuming you are trying to build your name via the video, my advice is to try practicing with more inspiring voice because the voice is very important.
Yes the voice and the video quality are the most important in a good youtube channel if the video quality isn't good then the people who visit your video would go onto another just because your video isn't of such good quality as others and also the most important thing is your content always keep your content good enough and of some quality for others, if no quality or nothing to gain then they will never visit your channel again.