Setup Annoto Plugin
Wistia iframe embeds take the exact same JSON parameters as a Standard embed, but they must be properly URL-encoded using a bracket syntax.
To add the Annoto plugin, add the following URL query param to the iframe src:
plugin%5Bannoto%5D%5Bsrc%5D=https%3A%2F%2Fcdn.annoto.net%2Fwistia-plugin%2Flatest%2Fplugin.js
For example an iframe embed may look something like that:
<iframe src="https://fast.wistia.net/embed/iframe/r440odi4pc?seo=false&videoFoam=true&&plugin%5Bannoto%5D%5Bsrc%5D=https%3A%2F%2Fcdn.annoto.net%2Fwistia-plugin%2Flatest%2Fplugin.js" title="Borrowed video: Welcome to Wistia!" allow="autoplay; fullscreen" allowtransparency="true" frameborder="0" scrolling="no" class="wistia_embed" name="wistia_embed" allowfullscreen msallowfullscreen width="100%" height="100%"></iframe>
The widget would not load in the Wistia player Iframe yet. The widget is bootstrapped and loaded once the setup is complete. Please read Customise Widget Configuration for more details.