Was able to clear drain via overlfow and pulled back large amounts of hair. Inspected waste and over flow via access behind tub and saw over flow was plumbed in with an improper drain and was leaking. Strongly recommend replacing of P trap and waste and over flow for bathtub. Also performed camera inspection via roof vent and found that tub drain had large amounts of build up and could not see condition of drain due to build up. While drain is open due to replacement of p trap I recommend performing descaling and following up with camera inspection to make sure there are no further issues.