I don't know how I would get thru the work shift without YT! I work for an organ procurement organization and coordinate organ, tissue, and eye donations, so it's a lot of hit or miss work. I work 12 hour night shifts and I can do anywhere from 5 minutes of work in a shift to 10 hours of work! This sounds bad, but as long as people aren't dying, there isn't any work to be done!
So, to answer your question, yes, YT is ALWAYS a tab on my browser while at work!