To remain silent after talking about someone

In this video , the interview goes like this (approximate translation from the french) : "It was the famous story told to abu Bakr... **I will remain silent for a moment, for believers who are watching**, well... -You can do the... -No, I don't like this kind of stuff, but I respect **those who would want me to remain silent for a moment**, so I will." Who is the abu Bakr (I'm not sure about the spelling) he is talking about ? Does one have to stay silent for a few seconds after mentioning him ? Or, if I assume correctly that abu Bakr is deceased, does one have to stay silent for a few seconds after mentioning any deceased person ? I am not a muslim, I am just a curious person who watched a video and wanted to understand. EDIT: I am probably misspelling the name of Abu Bakr. EDIT2: Since two people agree on the fact that we are talking about abu Bakr, I change my original, misspelled "Boubakr" to the correct "abu Bakr".