Only time I've encountered something like this was OK GO's All Is Not Lost music video released in 2011, it came with a warning that you could skip but then the performance were so bad you could not enjoy it.
it was available at http://www.allisnotlo.st/ but now features an error message about google dropping python 2.5
Any specific examples of this? A URL, or a couple of them?
When making such an assertion, it would be nice to minimally provide a way for others to see for themselves.