Use several ways to find bloggers, do not stop at one or two - otherwise you will greatly narrow your search area. Make hypotheses - where your bloggers might be, where they go, who they read, what they write about - and this will help you find them. Don't trust all the reviews. Reviews for this or that blogger may turn out to be fake in order to attract more advertisers.

The normal development of the channel is accompanied by an even growth of subscribers. Sharp jumps up can indicate successful advertising / PR moves or fraud, and a wave of unsubscribes - about problems with reputation, the output of low-quality content. How do you like YouTube's top 10? At the same time, the number of subscribers almost always differs from the number of viewers. Some followers will not notice your new videos, but they will attract a completely new audience: from recommendations, search, and external resources. In addition to unique viewers and subscribers, it is also useful to look at the reach (total number of impressions) and CTR of icons (conversion from impression to view). The higher the number, the better: The growth of subscribers indicates that you are producing high-quality content. The number of viewers shows how many people are watching your videos. Coverage shows how many times your videos were shown in search results, recommendations, and feeds.

I follow YouTube a lot In different markets and in a wide variety of niches From tech blogging to survival lessons in the forest I know many niche popular channels that most of my friends have never heard of