sorry, first question is somewhere wrong... but I couldn't figure out where...

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I have courses with the same content (Webside) and I like to have a solution to only edit/manage 1 page.

I've tried with:

https://apps.odoo.com/apps/modules/13.0/website_embed_html/

but it doesn't work with 'embed' or 'iframe' (or maybe it's just me and I do something wrong...)