At #teamTAFE you’ll hear this over and over again: copyright matters.
There are laws in place to ensure we don’t just use whatever content we find online. Admittedly those laws are complex because they can vary from jurisdiction to jurisdiction. Many countries use their own copyright laws to determine whether or not a violation has occurred. You can read more about international copyright law here.
TL;DR: Assume you cannot steal borrow the stuff you find online.