Yes, there is some beta footage in the video. I will point them out and make comparisons:
The footage starts at 11:45, and near the end of act 1, you will notice some differences. Near the start, the shield monitor's missing, and at the end of the act, there's no score tally. Although there's no score tally in the SW proto, if you notice, the Coconuts badnik is in the level, which doesn't exist in the SW proto (in place is that slug badnik), but exists in Beta 4. At the end of act 2, just like in the SW proto, Robotnik's vehicle is already there, while in Beta 4, it works like the final. In CPZ, the loops are octogonal, like in the SW proto and unlike Beta 4. Sonic uses his final sprites and there isn't a boss in CPZ, just a signpost. There's a Sol (Orbinaut) near the start of HTZ rather than those hermit crabs, unlike in Beta 4 and even the SW proto, where there's no badniks.
In short, it's a revision between the Simon Wai proto and Beta 4, in other words, the lost Beta 3
. (Thanks to SuperEgg for assistance in analysing this.)
This post has been edited by Dandaman: 01 October 2012 - 06:04 PM