Can you watch other teams' practice squad players, or just in pre-season and what you get in training camp film?

I'm guessing Guter's going to pull from the Ron Wolf/Ted Thompson draft strategy: draft a few guys at a position of need and hope at least one works out. Hell, during the rise of Randy Moss, Wolf once drafted defensive backs with his first three picks in a row. Only the third-round guy, Mike Mckenzie, really worked out. If I recall, his first round guy was a safety who did not like to hit, and his second round guy was traded to Seattle (his first name was Fred, I think) for some fumble-prone running back named Ahman something-or-other...