On your title you wrote 'server' ... which derives from servant ... though on the video you say waiter and waitress ... why the click bait title?
I don't care about PCs .. but a waiter is not a servant!
I waited tables for a few years in my life, and every time I heard the word servant, it made me feel like a slave ... it never sounded OK ... sorry for the thumbs down ...
RE: Should you still tip a shitty server at a restaurant?