I just read some posts about using hashtags on your YouTube video description, many saying it was just a rumor, others saying "don't overuse it", etc!
BUT, if you go to YouTube's help page, there is a specific section asking you to NOT USE more than 15 hashtags on your video description.
You can read all about it here, from the official YouTube help page.
BUT, if you go to YouTube's help page, there is a specific section asking you to NOT USE more than 15 hashtags on your video description.
- Over-tagging: Don't add too many tags in a single video. The more tags you add to a video, the less relevant they become for viewers who are searching. If a video has more than 15 hashtags, we'll ignore all hashtags on that video. Over-tagging may result in the removal of your video from your uploads or from search.
You can read all about it here, from the official YouTube help page.