Well, there is no problem with YT linking but, sadly, it is only possible to link SF into your Project page. In forum it appears as a text hyperlink (see Keith’s post above) or plain code:
<div class=”sketchfab-embed-wrapper”>
<iframe title=”A 3D model” width=”640″ height=”480″ src=”https://sketchfab.com/models/f8f37bf684df4836961caa2491762843/embed?autostart=1&ui_controls=1&ui_infos=1&ui_inspector=1&ui_stop=1&ui_watermark=1&ui_watermark_link=1″ frameborder=”0″ allow=”autoplay; fullscreen; vr” mozallowfullscreen=”true” webkitallowfullscreen=”true”></iframe></div>
