<p>The <dfn id=dom-navigator-canplaytype title=dom-navigator-canPlayType><code>canPlayType(<var title="">type</var>)</code></dfn> method must return the empty
string if <var title="">type</var> is <a href=#a-type-that-the-user-agent-knows-it-cannot-render>a type that the user
agent knows it cannot render</a> or is the type
"<code>application/octet-stream</code>"; it must return "<code title="">probably</code>" if the user agent is confident that the
agent knows it cannot render</a>; it must return "<code title="">probably</code>" if the user agent is confident that the
type represents a <a href=#media-resource>media resource</a> that it can render if
used in with this <code><a href=#audio>audio</a></code> or <code><a href=#video>video</a></code> element;
and it must return "<code title="">maybe</code>" otherwise.
to network errors, causing the user agent to give up trying to
fetch the resource</dt>
<dt>If the <a href=#media-resource>media resource</a> is found to have <a href=#content-type title=Content-Type>Content-Type metadata</a> that, when
parsed as a <a href=#mime-type>MIME type</a> (including any codecs
described by the <code title="">codecs</code> parameter, if the
parameter is defined for that type), represents <a href=#a-type-that-the-user-agent-knows-it-cannot-render>a type that
the user agent knows it cannot render</a> (even if the actual
<a href=#media-data>media data</a> is in a supported format)</dt>
<dt>If the <a href=#media-data>media data</a> can be fetched but is found by
inspection to be in an unsupported format, or can otherwise not
<p>The <dfn id=dom-navigator-canplaytype title=dom-navigator-canPlayType><code>canPlayType(<var title="">type</var>)</code></dfn> method must return the empty
string if <var title="">type</var> is <a href=#a-type-that-the-user-agent-knows-it-cannot-render>a type that the user
agent knows it cannot render</a> or is the type
"<code>application/octet-stream</code>"; it must return "<code title="">probably</code>" if the user agent is confident that the
agent knows it cannot render</a>; it must return "<code title="">probably</code>" if the user agent is confident that the
type represents a <a href=#media-resource>media resource</a> that it can render if
used in with this <code><a href=#audio>audio</a></code> or <code><a href=#video>video</a></code> element;
and it must return "<code title="">maybe</code>" otherwise.
to network errors, causing the user agent to give up trying to
fetch the resource</dt>
<dt>If the <a href=#media-resource>media resource</a> is found to have <a href=#content-type title=Content-Type>Content-Type metadata</a> that, when
parsed as a <a href=#mime-type>MIME type</a> (including any codecs
described by the <code title="">codecs</code> parameter, if the
parameter is defined for that type), represents <a href=#a-type-that-the-user-agent-knows-it-cannot-render>a type that
the user agent knows it cannot render</a> (even if the actual
<a href=#media-data>media data</a> is in a supported format)</dt>
<dt>If the <a href=#media-data>media data</a> can be fetched but is found by
inspection to be in an unsupported format, or can otherwise not