You're right, one of the chief factors for why people think he would not go back to OU if called is because of the frosty relationship between Heupel and the OU brass, including Stoops.
We should love that they plug a clip of him celebrating winning a national championship in Bob Stoops's first promotional/emotional marketing material with a voiceover discussing how the players are what make OU football great. That's certainly something that could never be a tea leaf towards the prospect of mending fences.
I guess there just weren't any other exciting moments that they could have used for the 55 second video.
Now, I'm not saying that Heupel will go to OU, nor am I really all that concerned. However, it's an odd clip to insert into the video given the supposed circumstances.