For you lucky people not effected by this, it is a problem with Yahoo email failing to run on Thunderbird since mid-July. The unfortunate ones (like me) will know exactly what I am talking about. I've now done a fair bit of googling and, like a lot of similar sofware problems, what you find is that there are a fair number of attempted solutions (often complex) that work for the originators but not for many people who then attempt to use them. Video Ad includes various creative visual elements which attract consumers with more effectiveness in advertising method. What we need is an authoritative statement from Yahoo (it seems to be their error message) on what the problem is and when it it will be solved. Unfortunately as often seems the case, there doesn't appear to be any such thing. Of course, I may well be wrong, in which case I'd really appreciate knowing what is happening.