0-100 subscribers.
Now this is truthfully one of the hardest barriers to pass as a Youtuber, don't be fooled. My first 100 subscribers took more time than the next 1000. It's very hard to generate traffic to your channel. At this stage you can't even use Reddit to promote your videos, Reddit folk generally tend to upvote less when they see it's a video with no likes/comments/views. Also it's nice to have subscribers upvoting for you, regardless of how big the subreddit is.