Oneboxing google drive videos does not work

I just ran into this limitation myself, but it’s possible. You’ll have to whitelist the iframe source domain in allowed iframes.

Then grab the Embed item HTML which will look like this:

<iframe src="" width="640" height="480"></iframe>

If working with a Share with others link, it will look like this:

so you’ll have to replace /view?usp=sharing with /preview for the iframe to work.