According to Jalopnik the one with Travis getting into the taxi with Jeff (posted above) is "real." The one that came before it (where Jeff supposedly does the test drive) was made to look like it was real. Jeff didn't drive the Camaro in the first one supposedly, a guy named Brad Noffsinger did.
Making a second video doesn't make the first video not fake. Fuck, making a second video don't make the second video not fake. I'm not saying they are fake (I don't have have an opinion on them nor do I give a shit), but I fail to see the logic here.