Some of the roots under Escondido have been growing into the same sewer lines for 50 years. One of North County's oldest cities grew up with its trees, the original plantings are huge now, and their roots reach the moisture sources in the neighborhood, your sewer line included. An old clay line has a joint every few feet, and once a root gets into one, it grows from a thin root into a mat that blocks the line.
What happens after the backup matters. If the answer is just clearing, the roots return through the same opening, and that's one common reason a backup in Escondido keeps coming back. Ending it starts with knowing where the roots enter, which the camera helps identify, and then closing that entrance, which is the actual fix. One joint, one section, whatever the footage shows, addressed specifically.
The whole process runs on evidence and plain English. You see what the camera sees, hear every option with its tradeoffs, and make the decision at your own pace, with the work performed by or under a licensed contractor when you're ready.