One of the common mistakes that new YouTubers make is using a low quality camera. YouTube is all about videos, so there's no point in uploading a video which cannot be seen properly. A proper camera, good amount of light, proper editing, and good audio quality is a necessity for a video to gain more views on YouTube.
Inappropriate Channel Name
Many new YouTubers commit the mistake of not selecting an appropriate channel name, which makes them lose out on views on their videos. It is important to select an appropriate channel name. Your channel name should be catchy and different for your videos to get more and more views. Also, do not copy the channel name of some other video. Your channel name should be unique and stand out from the million others.
Not Commenting Back
As a new user, make it a point to reply to the viewers as much as you can. This creates a positive impression among users, as they feel connected and special. Do this for them, and they will return you the favor. Not replying to comments will simply make your viewers lose interest in your videos.
Many a time, we see people commenting on videos, like 'Nice video. Check out my video (and the link). This should be strictly avoided. Nothing annoys a YouTube user more than this. Instead, put some valuable comment on that video which will be appreciated, and people will like to know more about you.
A mistake committed by YouTube newbies. They upload a video which is too long for anyone's attention span. If you upload a video that is too long, viewers will lose interest in it. But then, this does not mean that you make the video so short that viewers do not understand what the video was about.
Time Gap Between Videos
There should be a time gap between uploading your videos. The mistake that new YouTubers commit is that, if they do not get views on their upload, they either start uploading multiple videos, or do not upload any video at all. Instead of doing this, follow a regular time gap between your videos. But that doesn't mean that your videos have a time gap of a month or so. A proper time gap should be followed while uploading your videos.