You should be able to use:

pkill totem

A generally helpful thing to find which processes are hogging the CPU is top:

then you can press k and type in the PID of the process, and then press Enter twice to kill it;

Another program that can do this is htop:

This can also system resources being used, and processes can be killed by selecting them, pressing k, and then pressing Enter. Parent processes can also be found by pressing t to toggle tree view.