I wasn’t aware that W line judges made their calls by watching a YouTube video filmed from an overhead angle. I think W should consider letting line judges make the calls from what they see from their on-court positions. Or alternatively don’t make them stand on the court. You can just position them in seats in a well lighted, A/C room. There is no need to have them come on to court with all the attendant downsides: among others, getting the stink eye from aggrieved players, risk of being hit by a ball, public embarrassment from overrules and ruining the backgrounds of photographs.