They’re straight rips from the LaserDisc.
Thanks for confirming, JawsTDS. The uploader thought they might be from the original laserdisc masters rather than rips.
Actually adywans 1997 reconstruction was 1080p I think though I don’t think it was 100% accurate don’t remember him adding Luke’s scream back in or fixed any other tiny differences that may have been there just put the old emperor back in but was there anything else?
Checking my copy of it, the scream is in there.
Yes, I believe Adywan’s 1997 reconstruction of ESB used an audio track from a laserdisc of the 1997 SE, so the sound should be entirely accurate including Luke’s scream.