linked playback of a 360 video
When I add a 4K 360 video using an external URL, the player does not give 360 playback in Safari. When I upload the same video it does play 360 in Safari. I both cases the "This is a 360 video" is checked and set to monoscopic.
The uploaded video plays well in 360 in Safari, but only plays HD and stereo, it does not play in 4K or the spatial audio in the file. The linked version plays HD video and spatial audio.
So how do I get either version to play 4k with spatial audio?