Hi Toni! If you're using wordpress you can try out Dynamic Content: https://help.convertkit.com/en/articles/2502591-getting-started-the-wordpress-plugin6.
Eg set up a paid newsletter that contains a link to your page. Embed your video in it but show that video only to people that have a certain tag.
Then set up an automation that starts with product purchased > timer tag is added > then 10 day delay > timer tag is removed and embedded video can't be seen anymore.
Hope this helps.