Errors in your validation

Hello,
today I have got a validation from you about my website:
http://youlookvideo.de

There were more than 200 errors picked from you, but
when I checked it, all of them have been ok. You always had tags marked,
but they were ok?
So what happened.

With other websites of mine was similiar...

So, I think you have to check your algorithm?

kind regards
Willy Wallé