CLEAN : Demonstration in Paris against job cuts at BFMTV and RMC

The video transcript includes a casual introduction mentioning songwriting, followed by a discussion on triangles and Apple. It then transitions into a segment about beauty and repeated phrases, and concludes with a discussion on PVC pipes and pathology.

What does the speaker mean by 'tooth Apple' in the conversation?

What is the context of the phrase 'pathology scope of the best PVC pipe'?