Running PySlowFast on pertained model

Hi! Trying to run the SlowFast model on pre-trained kinetics 600 dataset weights.

The weights were downloaded from model zoo in .pkl format.
Now i understand that post downloading pre trained weights, we can skip the data set preparation step.

Post that, is there some file that we need to edit to include the path to the pre-trained weights and the video we want to run it on? and what's the final run command to run the program. Don't know how to proceed from here.

ps: I understand the question may sound too simple, however, been stuck on this point for last couple of days. Will appreciate any help possible.