Here is a lecture at the Master’s Seminary where Mike Gendron in a short amount of time is able to cover the essential basics regarding Roman Catholicism in contrast with the Biblical gospel:

by Nathan Busenitz

https://www.gracechurch.org/sermons/11096

https://s3.amazonaws.com/static.gracechurch.org/sundaysinjuly/GCC_Why_We_Are_Not_Roman_Catholic.pdf