The comments under the most-watched videos on a topic are full of questions the video did not answer. Each one is a viewer telling you what they searched for next. This post turns those comments into a ranked list of questions: find the videos, collect their top comments, pull out the questions...
Source: [Dev.to](https://dev.to/josh99smith/find-your-next-video-ideas-in-the-questions-viewers-ask-under-the-top-videos-in-your-niche-4lod)