There are a lot of images, music, and videos on the internet. You can find it easily, so you may want to bring it before you even think about whether it's okay to use it. However, the more you create, the more important it is how you handle other people's work.
There is a person who created the work
Paintings, photographs, and music are all things that someone took their time to create. So just because it's on the internet doesn't mean you can use it freely. If you don't want your work to be used without permission, it's important to feel the same way about other people's works.
The creator's manners are part of the work.
Make it yourself, look for something you can use, and give your name if necessary. Knowing these methods will make your work much more serious and powerful. It's not just about whether it's good or not, but how it's made is also important.
Next time you want to use an image or music, stop and think, "Is this something I can use?"
At Digital Kodomo BASE, we will convey the joy of making things as well as the attitude of valuing other people's works. That is also a great ability to create.