Closed Captioning automatically on for embedded html

[ccheyne]

I am trying to embed my video into an iframe but have the closed captioning turned on by default. I see auto-play and some other perimeters are available but nothing is listed force Closed Captioning to be on.

https://docs.microsoft.com/en-us/stream/embed-video-oembed

It does look like there is the ability to do it with youtube videos with oEmbed by using cc_load_policy=1&cc_lang_pref=en but it does not seem to work with a stream video in any format.

Any help would be really appreciated. 

[#2]

@ccheyne 

I am trying to do something similar by having our captions play automatically in the embed.  Have you had any success with this feature?  (the documentation I've seen said this isn't one of the supported options-https://docs.microsoft.com/en-us/stream/embed-video-oembed)