Personal Avatars, Voices, Through Video Agent API

Right now when I send a prompt to the video agent API it replies it can't access personal avatars, voices, templates, etc... Do you have any info about when that's going to be available? That would be a game-changer and I'd consider upgrading to the paid plan to be able to use that.

Note: I'm not using the Standard Video Avatar API because it doesn't support creating B-rolls automatically or adding music like the Video Agent does.