YouTube's hashtag rules in plain English
- No spaces. “#easy pasta” becomes just “#easy”. Join words together: #EasyPasta.
- No more than 15. If a video has more than 15 hashtags, YouTube ignores all of them.
- The first three can show above the title when they're in the description and the title itself has none.
- Keep them relevant. YouTube's policies don't allow misleading or unrelated hashtags, and it may remove them.
Where to put hashtags
Most creators add them at the end of the description. You can also put one or two in the title — but then YouTube shows those instead of the ones from your description.