When Will watches his viral video, he expands it to full screen then sits back to watch. As Skeezy D speaks without interruption, the next shot of the screen shows it is no longer a full-screen view even though Will was not shown leaning forward to press the ESC key. Similarly, when he gets excited about the number of views rising in real time (which YouTube does not do), he raises his arms above his head, but in the immediate next shot the laptop screen is displaying the comments section that was not visible in the previous shot, even though there's no way Will could have scrolled down while his hands were high in the air.
Will says he has created YouTube videos for years and is excited when one of his videos goes viral, but when he brings it up on his laptop, it is not YouTube, but a vaguely similar but completely generic site. This probably indicates that licensing the actual YouTube interface was too expensive for this film.
Will's viral video gets its first comment after the view count has exceeded 125,000. It's almost inconceivable that a video with that many hits would not generate a comment sooner.
In the credits, Greg Germann's character is listed as "Fernando the Accountant" but in the film his job title is Director of Client Services at an executive placement firm--a job that involves meeting current and prospective clients, not accounting.
When they turn on the giant TV, before the Halo menu, there is a clip of his mom and dad and a waiter at the restaurant they just left playing on the TV.
After Will unplugs the TV and takes the controller away from Jillian, his friend plugs the TV back in and the player in the game is still playing, even when nobody is holding the remote.