Astalavr Download ((top))er -

The tool should be able to identify MP4 or MKV containers that store the 180° or 360° side-by-side (SBS) data.

This is the industry-standard command-line tool. While AstalaVR is not always "natively" supported as a site-specific extractor, it can often handle the streams if you provide the direct URL or use browser cookies. yt-dlp on GitHub . astalavr downloader

Using the Astalavr Downloader is straightforward: The tool should be able to identify MP4