Isn’t the video in 480p to start? Why would you need to upscale it to that?
How does it look? Are you willing to share your upscale? I would be curious to see it in 1080p or at least 720p.
Also, there was someone who made this. Apparently they upscaled it to 4K and it looks absolutely incredible: https://www.youtube.com/watch?v=O6mA1U3lUVc
That video was part of ANH:R (HD), not (SD).
Besides, I’ve deleted mine a while back, I cannot share it. One thing that I would give a heads up is, if you upscale it directly from 480p to 1080p/4K, there will be huge pixels on the video.
You need to upscale it gradually to prevent this. Anyone up to the task, I wish you good luck.