copyright music

Hello, I have an Instagram profile where I make animated motion graphics and stuff, and I was wondering if there are rules about using music in your videos. I currently just work copyright free music from YouTube's audio library, SoundCloud and Newgrounds artists that gave me permission. But...

I have some across many vlogs where the radio is playing in the background. But I have heard that playing music that is not yours in your videos is violating copyright laws. What are the guidelines here?

So I just watched a video that The Gabbie Show posted where she makes fun of her sister's Musicallys. How is she able to do that though since the music is copy written? Is she just not monetizing the video? Help! I'm super curious.

Hey guys! I'm just curious if it is allowed by the YouTube terms of services to use Copyright music in videos that are not monetized without them being striked or taken down. If you guys could share your knowledge/experiences, it would be much appreciated! ^.^

Hi i'm new to the YouTube community and I don't know a lot of things about the copyright infringement. I plan on doing a channel based of music reaction videos. What should I do in order to not make my content flagged by copyright issues? Also, let's say I'm doing a vlog and I want to use a...