This was a sneak peek for both 101 Dalmatians: The Series and Recess from March 1997, for Disney's One Saturday Morning block on ABC (the block didn't officially debut until September). The pilot for 101D:TAS was never televised, and the Recess pilot was re-made into the first episode (which is why Gus is missing). Yep, they are VERY different.
This preview was included on the 1997 VHS releases of 101 Dalmatians (1996) and Disney's Doug's Birthday Blues (Regarding the different looking Recess gang, it was even more confusing on that tape as the final designs had already been released to the public).
Note that the video is slightly faded. The colors are a little lighter than they should be, but not too much.
101 Dalmatians: The Series and Recess are copyright of The Walt Disney Company. For entertainment, not profit.