Corporate (secure) video sharing alternatives to YouTube and Vimeo?

Hi guys, reaching out because we are running out of ideas for viable products.

What we're trying to achieve here is to distribute videos to our internal stakeholders in a secure channel only accessible to those that we send it out to.

I am aware Sharepoint exists as a solution and that is what I had initially suggested but the red tape on that is absurd so, out of the question. Funny enough, that has now opened us up to seek less secure methods to distribute these videos through third-party cloud tools. I am still fighting this fight but timing is of the essence so need an alternative.

Our recipients are across multiple domains and e-mail services (@gmail.com, hotmail.com, outlook.com, yahoo.com, etc.) the best way to (I think) to allow everyone easy access to these videos is to have the service serve an e-mail OTP to validate that the link sent out is usable only by the e-mail owner.

I have already tried Loom and we can't restrict it to certain people. The link doesn't work unless I add them explicitly to a workspace as a collaborator or keep the link open to anyone, which defeats the purpose of securing it.

YouTube is out, even if it's private, no way to restrict to email OTP. No leeway here.

I have not tried Vimeo yet as it's asking for a credit card to even test the product. Has anyone tried this to distribute video securely to multiple domains?

We also want no accounts or logins, just validate your e-mail. We want ease of use for the consumers here.

I am resolving myself to use something like Wordpress or Substack but even that I'm not sure will be able to do what I'm attempting here. Any ideas?