If the record label doesn't want you to use their music on your video.
Yes, it is generally illegal to download YouTube videos without permission from the copyright holder, as it violates YouTube's terms of service and copyright laws.
Some music videos are removed due to the copyright owner claiming the video as their property and demanding the YouTube user to take down the video. Most music videos on YouTube are user-uploaded and not all of those videos have permission from the copyright holders to be uploaded and used on YouTube, which results in copyright complaints and videos getting removed.
I think that the only videos on youtube that are copyrighted are like the Vevo videos, or like the Videos uploaded by the band themselves.
No. Videos on YouTube remain the property of the uploader.
No, it is not legal to download YouTube videos to MP3 without permission from the copyright holder.
Because they were an infringement of copyright.
yes its bad if one of your youtube videos are deleted because they have been claimed copyright.
There's probably no videos of Cars 2 (the full movie, including putting it into parts) to start with. This is due to copyright infringement.
Downloading YouTube videos without permission is a violation of YouTube's terms of service and can lead to copyright infringement. It is recommended to use legal methods such as purchasing or renting the content from authorized sources.
maybe because it has really bad stuff in it or the music is copyright
That's what the term "copyright" means, that the work in question (musical or otherwise) belongs to someone and cannot be copied without the permission of the owner (who normally wants to be paid).
Yes, it is legal to listen to YouTube videos as long as you are not violating any copyright laws, such as downloading or distributing the content without permission.