The new footage was posted on PopCandiesTV -- showing Zac (in a plaid shirt) pacing around Dillon's Irish Pub while LAPD officers spoke with Rottman (in the DARK blue shirt).
Rottman can be seen taking a field sobriety test around 2:00 into the video.
Rumor Willis appears at the end of the clip -- and can be seen driving Zac Efron away from the scene.
As TMZ first reported ... Rottman -- star of Nickelodeon's "Gigantic" -- was originally pulled over in Hollywood after his car jumped the curb. Cops detected alcohol -- and a breathalyzer showed his blood alcohol level was more than twice the legal limit.
He was taken to jail, booked and released a few hours later without having to post bail.