If you upload any content that contains copyright-protected material, claims can be issued by companies that own them. More info here: https://goo.gl/uVuZfj . Also, take a look at our Help Center article about Community Guidelines that should be of help: https://goo.gl/JN7Cdx
While we can't share specifics, we suggest taking a look at our Help Center resource on copyright FAQ's that may answer your question: https://goo.gl/ceKyg9 . Hope this helps.