Yes, that’s right. Vimeo now finally supports 360° videos. Although YouTube has supported 360° videos for a while, many have criticised the low quality and high compression often shown. Even when uploading 4K 360° video to YouTube, the already degraded image loses so much more as a result. Facebook’s 360° video suffers from even higher compression rates and lower resolutions.
Vimeo has always been the place to go for hosting video if quality is your highest concern. And that seems to also hold true of 360° video from what I’ve seen of the samples posted so far. That’s probably thanks to its two-pass transcoding, which is almost always going to result in increased quality, even at the same bitrates.