How to embed a videos in KB from unsupported hosting platforms?

We are a global company with many customers across China and need to support them with video tutorials.

However, as Vimeo and YouTube platforms are banned across China, and BiliBili.com (commonly used in that region) not being supported by Zendesk, we find that the only way to embed the iframes in the source code is to allow unsafe content across the entire HC.

Is there another way to do this without enabling unsafe content?

Also, when is Zendesk likely to add BiliBili to the list of supported hosting platforms?