“If there were camera phones back in the day, the biggest athletes in the world would have had a lot of explaining to do.”
— Kobe Bryant
Simplified Meaning:
Back before everyone had smartphones with cameras, athletes could get away with doing things without anyone knowing. They might have behaved badly or done things that weren't very nice, but there wasn't anyone around to take a picture or video of it. Today, if a famous athlete does something wrong, someone's always there to film it and share it online. This means that athletes now have to be much more careful because anything they do can be seen by millions of people in just a few minutes. For example, if a famous soccer player were caught being rude to a fan, it could end up on social media quickly, and they'd need to apologize or explain their actions. So, the advice here is to think before you act, especially when you know many people are watching.