How is possible to avoid the infringment copyright problem? I see some videos with the description as: "all the rights are owned by..." Would be enough something like that?
yes that is....is the country or states that follows copy right law very strict, this is must to mark the video with those acknowledgement...hence, those should not be re used otherwise there will be a matter of law.....
Is it from a recent movie/music video/clip owned by a big company? Then it's copyrighted, and can be deleted.
No, that is bs put by people thinking it will protect them, but in reality it does not have any legal base. If you upload any copyrighted video, it is considered copyright infringement, unless you cut a small part of a copyrighted video, and add your own content to it- like a commentary on a fragment on a movie - and then you can claim it falls under the fair use license, for education purposes - similar with news, or etc - in which case the copyright infringement claim will be decided by a court. But otherwise, you run the risk of having it deleted - which is not that big a risk if you do not use your own youtube account, and upload in mass.
The best way to avoid it is just don't upload copyrighted material. I'm sure you know if it's copyrighted or not. Usually movies, tv shows, music videos, applications, songs, etc. have a copyright. To be sure u don't get hit with a copyright then make completely unique videos.
Did you create the video yourself? Is it under creative commons license? If the answer to one or both of those questions is "yes", then you don't have to worry. Otherwise, there is likely a copyright infringement.
Your country doesn't mean shit on YouTube. All laws on YouTube are California laws. If it's illegal in California, then it won't be on YouTube. That being said just saying all the rights are owned by or whatever doesn't do shit. If you're trying to actually upload copyrighted shit then you're going to have to add detours/effects such as flipping the video, audio tweaking, watermarking, etc.