Streaming!

Oh good grief, ridiculous copyright nonsense. Grr! It was Chateau by Rob D (Dougan) anyway :)

And any other materials could be copyrighted or sth?

None that I can think of, I believe that was the only one.

That worries me:

There are very few valid reasons for disputing a claim. Please review the information below, because submitting an invalid dispute could result in penalties against your account.
Invalid reasons to dispute a claim

I own the CD / DVD or bought the song online.

Buying a song, CD, DVD, or other piece of media doesn't give you authorization to post that content on YouTube. The content owner still has the right to choose where it is distributed.
The content was only a part of my video.

In almost all cases, you need written permission from the content owner to use even part of their work in your video. Learn more about Copyright.
There are other videos on YouTube with the same content. Why can't I use it too?

Copyright is all about the owner's right to decide who can use their content. Someone else's use doesn't give you permission.
I gave credit in the description. Isn't that enough?

No. Giving credit does not give you authorization to upload the content.
I'm not selling my video or trying to make money.

Whether or not you benefit financially from using the content doesn't matter. Unless you have permission from the owner, it's not yours to use.

Hmm, I don't know what to suggest - I'm far from an expert in that area. I know there are several ways to stop it from detecting music... ;)

Simon could you pop on Gwerdy I need to talk with you.