You need to edit in confluence folder /720p/ the archive ViewsVideoLibrary.xml and add the next code to your current view (mine is Medialistview3).
I put the code below the last input for its view
<include>AudioChannelsFlaggingConditions</include>
<include>AspectCodecFlaggingConditions</include>
<include>VideoTypeHackFlaggingConditions</include>
, so after the new code added will begin the next view (medialistview2):
This is the code to add:
</control>
<control type="label">
<posx>510</posx>
<posy>372</posy>
<width>150</width>
<height>30</height>
<font>font13</font>
<textcolor>white</textcolor>
<shadowcolor>black</shadowcolor>
<align>right</align>
<aligny>center</aligny>
<label>$INFO[ListItem.Duration,, $LOCALIZE[12391]]</label>
<scrollout>false</scrollout>
</control>