Caran I used to have this problem before I realised what to do. Try pasting the YouTube link in the box where it says Enter YouTube link here ........ then put some comment in the normal message box as if you were posting a normal answer to an AB post. I found if I didn't put anything in there and just put the link in the box above, the submit button was greyed out. Try pasting a YouTube link and explain what it is in the box below.