Iframe embed on 3rd party platforms like teachable can not have the email id as a watermark as email details of a user are stored at teachable backend and unless teachable integrates our APIs by partnering with us, it is not possible to do so. So, it is not possible currently.
However, timestamp, fixed text, IP address are possible as the watermark via iframe integration on such platforms.
Below is a link to the detailed tutorial explaining the video embedding process for these platforms.
Tutorial for iframe embed- https://www.vdocipher.com/blog/embedding-on-other-site-teachable/
The first half of the above tutorial has a video tutorial, while the second half also has a screenshot-based tutorial for embedding process on these platforms.
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