title: Allow embed/object/param HTML tags with HTMLPurifier?
body: <p>Is it possible to allow embed, object, and param HTML tags with HTMLPurifier? I'm trying to allow YouTube, Vimeo, etc. videos to be embedded, but they're always stripped, no matter what I try. I do understand that these are risky tags to allow.</p>
  
  <p>If it's not possible, what other HTML filtering options do I have with PHP? It doesn't seem that Tidy is designed for filtering... is it? And strip_tags() doesn't give me the level of control — such as only allowing certain attributes — that I'm looking for.</p>
  
  <p>Thanks for your help!</p>