Yes, it's possible to multistream HLS in Castr. You can multistream and create a livestream pulled from an HLS URL.
In your Castr Dashboard:
- Create a new Live Stream or Simulcast (Multistream) project
- Select the Pull streaming mode
- Under the Pull Source section, paste your HLS URL > Save
You will be able to stream HLS to multiple social platforms and on your own player using the Embed URL or iFrame Snippet.
Pull streaming mode in Castr Simulcast (Multistream)
Pull streaming mode in Castr Live Stream