David doesn’t want to call attention to her and be all over the tabloids. That’s why he ignores her.

May I remind you that they’re already all over the tabloids and that this is thank to this girl who thought it was a good idea to post their location and when they would be there on social media? If they wanted to keep it discreet, they would have shut down her Instagram account. No wait. If they wanted to keep it discreet he would have chosen someone who knows the definition of discreet.
So if they ignored each other on this video, it’s not because they want to keep things under the DL.