VidCon 2019 kicks off this week in the US, where attendees can meet some of the world's biggest YouTubers.
The convention is held in Anaheim in California, and is one of the world's biggest events for fans and creators who are passionate about online video.
Tens of thousands of people attend the event each year where they can experience live performances, panels, and fan and creator meet & greets.
YouTubers like: Liza Koshy, Rhett & Link, Joey Graceffa, Dan and Phil, The Dobre Brothers, Jelly, LD Shadowlady and Smallishbeans, Norbert The Dog, Poppy, and Rosanna Pansino from Nerdy Nummies will all be at the event.
They'll be joining in the panels, giving talks and meeting fans.
What are "deepfakes"?
One of the big panels will be discussing the issue of 'deepfakes'.
'Deepfakes' are fake videos that look and sound so realistic people may not actually be able to spot that they aren't the real thing.
People can use software to change a person's face or voice and make them say or do things that the real person hasn't done.
This can be very dangerous, for example if a deepfake was used on world leaders, it could mean a lot of people could get very angry or upset thinking they had said or done something bad, when they hadn't.
The panel at VidCon will be looking at how to spot and stop these kinds of videos on the internet.