Hello blackman,
I am very sorry I didn't reply earlier.
The error "Empty title" is thrown directly by YouTube, when your video has no title.
The thing goes like this:
a)If you add a video manually from your PC, you need to enter the title, description and tags manually
b)If you download videos using Mass Video Downloader, make sure in Add Details you use tags : #T#, #K# , #D# . So click on Add Details, and set :
Title: #T#
Description:
http://site.com #D#
Keywords: #K#
Of course the above is just an example.
Now let's say you already imported all items in MVB, and you forgot to set the title/descr/tags.
You DO NOT need to enter them manually. You simply select all items in MVB (press CTRL+A), right click and click on EDIT (this is called mass edit, all selected items will be edited).
And enter the title you want etc...
Hope this explains things, and again, sorry for the late reply.
Thanks,
Vlad