It seems like Linus has discovered the power of ad-libs. Rather than distract they actually keep people focused on what the main speaker is saying. Interestingly enough this is a practice that could be seen in black baptist churches for decades, where it's common for parishioners to parrot or reinforce key aspects of the priests sermon. This already common rhetorical practice of the black community eventually spilled over to rap... And now... Linus Tech tips. Its all come full circle.