Below is an OLD video on how to do it on Squarespace. It may help you in this process but it is a bit older and could be updated.
If you have a premium account with Squarespace, you can use the "</> Code" block to embed our BoxCast video player on your website. Check out this video below to see how it is done!
Q: My BoxCast player is not loading on my Squarespace website until I refresh? What do I do?
A: As of 11/04/20, Squarespace has a bug where your embedded player might not load on their website until you refresh. This is a known issue with Squarespace (documented here https://support.squarespace.com/hc/en-us/articles/115000253288-Ajax-loading#toc-enable-or-disable-ajax). Your best bet is to “Disable Ajax Loading” on the Squarespace settings.
If you have additional questions, please reach out to firstname.lastname@example.org.