User blog comment:DaNASCAT/Technical Update: June 11, 2013/@comment-4981281-20130612014407

"YouTube tags with a height value of 30 pixels or less will not be converted to File pages, since that is an alternate method of embedding audio content." So there is a way to bypass the unwanted conversion? At last, a solution; though if I recall, before, whatever &lt;youtube&gt; tags was converted (a serious nuisance), such as this.