How many characters can a YouTube video title contain?

How to get close to this number

Platform text limits cluster on round decimal numbers chosen by product teams, not on technical constraints, so expect something tidy. A title has to be long enough to describe a video and short enough to display, which in practice means a limit around the length of a long sentence. That reasoning brackets it tightly.

The more useful number is not the limit but the truncation point, and the explanation makes the distinction. Search results and mobile thumbnails cut a title off long before the allowance runs out, so the effective limit for anything a viewer reads is much shorter. Designing to the documented maximum rather than the visible one is a classic mistake.

That is why the front-loading convention exists. Creators put the keywords that matter at the very start, because the tail of a long title is invisible to most viewers and is only doing work for search indexing. The limit is a platform rule; the behaviour around it is shaped by where the text actually gets cut, and those are two different constraints operating at once.