I wouldn't be surprised if Pete brought him in as a UDFA, but I'm not expecting much.
First, he has almost zero experience at the college level. He played in one game for USC, zero games for Louisville, and then played 1 year for a division II school that went 1-10 the year before he transferred there. Out of Las Vegas, New Mexico. He claims to have lost his job at USC from injury, but couldn't beat out Mike Morgan or Malcolm Smith. He was also removed from the team by Kiffin for violating a "zero tolerance" policy of his. I know Kiffin is a douche and a bad coach, but that has to be a red flag.
Campbell transferred to Louisville, which I would consider a smallish school. Louisville was in conference USA before moving to the extremely weak Big East in 2005. Basically, they are a team I would expect UW to crush, and that says something. Campbell couldn't break into the lineup there, although there are excuses. Some say that USC sanctions played a part, but I think the story about his not being academically eligible passes the smell test better. Whichever reason it was, that excuse wouldn't have applied in 2012 but Campbell transferred anyway- to a division II school. That tells me that he had little confidence he'd even start in Louisville's LB corps in 2012.
As far as his tape, he looks dominant but remember that he's just 5'10". That's really short for a linebacker, and unlike QB there really isn't such a thing as short linebacker skills. You want your linebackers to be between 5'11" and 6'4". He's worth a look, but not worth a draft pick, IMO.