Hi
I went to w3c and I realized that the web site that was working had errors, but did not know how to fix this type of error when modules are placed so that videos from youtube to work automatically and paypal modules work well without affecting the page ? as I must fix these errors?
I am unfamiliar with that module when I use embedded video (like Youtube) I paste the code into a mod_custom module or an article. I replace the ampersands ( & ) with the html version ( & ). This is not a major issue so if you cannot solve it do not panic. But, having and error free html validation is always best.