At some companies, some people equate watching video with slacking off / not working. And even if that's not the case, unless you have headphones, in a multi-p

At some companies, some people equate watching video with slacking off / not working. And even if that's not the case, unless you have headphones, in a multi-person office, playing a video with sound can be perceived as kind of rude, especially if other people are talking on the phone.