Video is from X17 Online and they claim:
Kristen Stewart And Robert Pattinson Get Together For Lunch
August 8, 2009 - Kristen Stewart and Robert Pattinson were spotted meeting to have lunch at The Hall At Palihouse in West Hollywood. Stewart arrived in a cab and Pattinson sped to meet her in his Porsche. The two have been seen hanging out at parties, concerts and hotels for the past few days in Los Angeles. Maybe they are finally ready to make things public!
Gozde: I swear I watched the video 5 times, I can't see if it's even the same place. Maybe if I knew the place I would see it. All I see is a Kristen cornered at an elevator by papz and a seriously pissed off Rob driving a Porsche... Yeah, Rob is driving a Porsche... Clear the traffic! :)
Thanks to Danni for the link
Update: In light of the new pictures, yes Kristen Stewart and Robert Pattinson had lunch. Marcus Foster was also in presence. Because of the nature of the creepy pap video, the subject of the photos (people having a private lunch with friends (lovers, friends with benefits, whatever you want to speculate) we won't be posting the pictures.