Snaked customers sewer main from cleanout in backyard. Removed a large clump of roots which cleared the clog. Ran hose in sewer main for several minutes and everything was draining. Followed up with camera inspection and noticed customer had several root intrusions throughout the sewer line. Main issue is section where sewer main goes under wall in back right corner of yard. Was not able to push my camera past this section. Sewer line appeared to be collapsed or have large offset. Highly recommend digging up this section and performing spot repair. Once this section is repaired we can give estimate for replacing sewer main in backyard if need be.