I'm not the first person to notice Kay - in fact, I was alerted to her when one of the Pickford Brothers - they of Plok and Wetrix - linked to her videos on Facebook. She's even appeared on TV with Harry Hill, and boasts a considerable 19,000 subscribers.
As the title of her channel implies, Kay presents cooking videos - introducing them with a screech of "Hiiiiiii people!" - all filmed by Lee, who usually makes an appearance at the end to do a taste test. Unless Kay deems there's no point "because everybody already knows what chicken tastes like".
Typically, Kay will front her videos wearing either an Iron Maiden t-shirt (she professes not to be a fan of the band - she just likes the shirts), or, for some reason, a Soul Reaver: Legacy of Kain shirt. Seemingly without even trying - she started making her videos at Lee's suggestion, simply because she enjoyed cooking - Kay has become a bona-fide icon.
Unlike other YouTube channels, where everything is filtered and stylised, and posed, and polished, and strives to look professional, Kay and Lee do none of this. For me, that is precisely their appeal; they're an antidote to everything we've come to expect from YouTube. And I love their videos un-ironically.