Is it me or has something changed with submitting videos to Reallusion TV? 

In the past I have submitted nine videos to Reallusion TV and never encountered this problem. 

On the submission page when I select video for showcase type I copy the link for the video from YouTube (like I have done in the past) and then insert the link in the appropriate box.
However, after I click the submit button this error message pops up: “The file or link is not appropriate, please check again.” 
I have tried cutting and pasting the link again over several days with always the same error message popping up.

I receive no other error messages and all the categories with * are filled.  

I’m stumped. Any help would be appreciated.