Something called an auger (many of you may know this tool as a snake) would be used on larger tougher matter like tree roots. The tail of the snake if you will is sharp and powerful, able to chew right through tree roots and tar them into pieces. If the camera shows a thicker substance that’s more like glue in nature (like hardened grease) your plumber will get his hydro jet equipment ready to break up the clog. Hydro Jets are very popular these days, this amazing tool blasts high powered streams of water down your pipes, swirling all sticky matters right off you pipes and down to the sewer. It’s a pretty outstanding device by industry standards; many have commented their pipes look brand new once we get finished!