YouTube has said that they have signals that can determine the EAT of any particular YouTube channel, which is essentially the perceived expertise, authoritativeness, and trustworthiness of its chosen video topics.
This leaves many SEOs wondering if there are external ways to determine quality, such as backlinks and/or social shares.
However, there are ways for YouTube to see a video’s perceived quality. For instance, if a user subscribes to a channel after watching their video, that shows a quality level.
It’s important to check your YouTube Analytics to see if certain videos attract lots of subscribers, as this can give you an idea in terms of the content that your audience prefers.