In Santee yards from Carlton Oaks to the streets around Santee Lakes, mature pepper trees, pines and ficus send their roots looking for water, and an older sewer line with a loose joint is an easy place to find it. Once they're inside, they keep growing until the toilets and tub start backing up.
Most backups like that get the same answer. Somebody cuts the roots out, the line drains, and everyone moves on. But if the joint they came through is still open, the roots grow back through it. That's why the camera matters. It shows which joint or crack they're using and how much of the line is affected.
From there the fix matches what the camera shows. Sometimes that's sealing one joint, sometimes it's a section that's due for repair. Everything gets explained in plain English with the options and tradeoffs, and the decision is yours. The work is performed by or under a licensed contractor when you say go.