Okay, so let's imagine you love movies and TV shows, and you want to make sure you can see them really well. That means you want the pictures to be super clear and the colors to be really bright and pretty.
A videophile is someone who takes this to the extreme. They want the absolute best quality picture and sound possible! They might spend a lot of money on fancy TVs and speakers, or they might spend hours tweaking the settings on their TV to make sure everything looks just right.
They might also be really picky about what they watch, because they want to make sure it's in the best possible quality. For example, they might prefer to watch movies on Blu-ray discs instead of streaming them online, because the quality is usually better.
Basically, being a videophile means you care a LOT about how things look and sound on your TV, and you're willing to put in a lot of effort and maybe even some extra money to make sure everything is perfect.