Immersive videos are basically a projection onto the inside of a sphere which surrounds you. You cannot walk around inside of them in the format that they are in natively. Just as you can't walk around inside Mt Hood. You could potentially convert video into "Gaussian Splats" and walk around it, but there's a lot of math and guesswork by AI involved and I don't think there exists a standard format to present those scenes in, so you only have 3 degrees of freedom for a video.