YouTube Question title limit characters?

[klabacita]

Hi.
I have read different web pages related about the title limits, which is important for SEO, youtube let u type 100, others say we need to be 60 others 70, someone knows what

 

[Bookish Olive]

Most say 60. More important to not repeat words in Thumbnail, just enough words that the YouTube scroller is intrigued to find out more, but it should accurately describe contents.