What you need to watch a VR180 clip, and what the words on a product page actually mean.
VR180, side-by-side, 8K per eye
VR180 means the picture covers a half-sphere in front of you rather than a flat rectangle. Side-by-side
means the two eye images sit next to each other in one file, which is how depth gets there — play such a
file in a normal player and you see two squashed pictures beside each other, which is correct, not broken.
“8K” usually describes the whole frame, so both eyes together; the number that matters for
sharpness is the resolution per eye.
What plays it
On a Quest or a Pico, a player that understands VR180-SBS: DeoVR, Skybox, Pigasus and HereSphere all do.
On a PC headset the same players exist as desktop apps. A phone in a cardboard holder technically works
and is a poor substitute — the resolution the file carries is exactly what such a setup throws away.
Streaming or download
A 20-minute VR180 title at full quality is several gigabytes. Streaming avoids the wait but needs a
connection that holds the bitrate; a download plays without stutter and costs storage. Which of the two a
shop offers is worth checking before you buy, because for a file this size the difference is not academic.
Why the category label is not proof
A shop category called VR says what someone typed, not what is in the file. The reliable signs are a
stated projection (VR180 or 360), a stated stereo layout (side-by-side or over-under), and a resolution
that is far wider than tall. If a product page gives none of those, treat it as flat video until proven
otherwise.