Direct Answer The transcript section we have directly supports (a): if we assume we have a “plank/beam,” we will stop judging, speak more humbly, and focus on our own repentance before correcting others. The provided transcript is truncated before Bercot develops law #5 and the “other Christians in North America” emphasis, so we can’t fully ground (b) in this text; a reasonable inference is that he expects conflict and criticism and urges believers not to be stumbled.
Support from Transcript: