Loading Tweak RV

[Nachogor]

Excuse the basic question, but where should I paste this code:
<element>
<display class="tactic.ui.tools.ReviewWdg">
<search_keys>sthpw/snapshot?code=SNAPSHOT00000438</search_keys>
</display>
</element>

Custom Layout Editor / HTML or
Free From Layout / Custom Layout?

Is the VideoWdgt included in the new VFX_Template?

Just want to check it!

Cheers,
Nacho