Great Blender tutorial from CGMatter. His youtube channel is filled with original and well-prouced Blender tutorials.

In this blender 2.8 tutorial we go over how to remove 3D objects from your shot. We will be using projection painting to generate a cleanplate that we can track onto our shot. This is the third and final part of the projection painting series.

Some additional tutorials to consider:

Projection painting:

PART1: https://youtu.be/gz4qV5_zuMo

PART2: https://youtu.be/s_x62z1T9tk

Camera tracking:

PART1: https://youtu.be/InIuTtt7W3E

PART2: https://youtu.be/6Vo-jyWlDhM