Regarding printers: the yellow tracking dots are made exclusively by colour laser printers. If you have any inkjet printer or a pure black & white laser printer, there are no yellow dots. Other tracking methods might be possible, but this is the only confirmed method.
The wiki page on chocolate is not so sure about that one:
Despite a popular belief that chocolate derives from the Nahuatl word chocolatl, early texts documenting the Nahuatl word for chocolate drink use a different term, cacahuatl, meaning “cacao water”. Several alternatives have therefore been proposed. In one, chocolate is derived from the hypothetical Nahuatl word xocoatl, meaning “bitter drink”. Scholars Michael and Sophie Coe consider this unlikely, saying that there is no clear reason why the ‘sh’ sound represented by ‘x’ would change to ‘ch’, or why an ‘l’ would be added.[4] Another theory suggests that chocolate comes from chocolatl, meaning ‘hot water’ in a Mayan language. However, there is no evidence of the form ‘chocol’ being used to mean hot.[4] Despite the uncertainty about its Nahuatl origin, there is some agreement that chocolate likely derives from the Nawat word chikola:tl.[5]
Considering they removed the audio and the officer is calmly talking to her and even smiling at the end of the video when he moves on, I seriously doubt that he wanted to arrest her. The only reason I can think of for removing the audio is if it contradicts the captions.