Mike Young Productions/Scholastic (2000)
From PBS prints of "Clifford the Big Red Dog" (the 2000 TV series).
Interestingly enough, because of the new Clifford TV series, PBS has also added a couple episodes of the 2000 series to their website and app to watch. I don't know if PBS themselves have ever offered the 2000 series to watch online, not including the 24/7 channel (You'll know if PBS is responsible when only a Scholastic logo appears at the end of the show). Unlike the current PBS airings, there is no credit crunch, meaning the credits play without any interruptions. Funding credits don't appear, but that's normal for PBS' online releases. I took this from a 2002 episode because of the lack of dot crawl, leading to a better looking video.