Newbie - cannot upload video item :-/ please Help!

Hi there,

I want to upload my first file as an author which is small a video file to get on the road in here.
Yes, I have read all the instructions and am using the upload mask to upload the clip.

I get a list of errors but all the required fields are filled in correctly.

What can I do else? Is there a possiblity for a Newbie like me to get some further help?
According to the informations provided by envato with the new upload function Previews and Thumbnails are genereated automatically… but in my case even the main file (.MOV) is not recognized as correct. I tried .zip and .mov files which is supposed to work, right?

Any help appreciated. Maybe I am just blind and fail to see what might be very easy …

Thank you.