There isn’t a reliable public count for “YouTube accounts that are 8,” because YouTube doesn’t publish an age-based breakdown of accounts, and the phrase is ambiguous. The closest public stats are about overall YouTube channels and users, not how many accounts belong to 8-year-olds or how many accounts are exactly 8 years old.

What can be said

  • YouTube has on the order of 113.9 million to 115 million channels in recent estimates.
  • YouTube has about 2.6 billion to 2.7 billion monthly active users in recent estimates.
  • None of the public sources I found break that down by age in a way that would let us count 8-year-old account holders.

Why it’s unclear

Your wording could mean:

  • accounts owned by 8-year-olds ,
  • accounts that are 8 years old ,
  • or something else entirely.

Best estimate

If you mean “8-year-olds with YouTube accounts,” there is no trustworthy public number I can verify from available data. If you mean “accounts that are 8 years old,” that also isn’t publicly tracked in a way that produces a reliable global count.

TL;DR: There’s no solid public statistic for that exact group, only broad YouTube totals.