Also, don't you have to put a coat of varnish in top of the paint? If she only used paint the cleaning supplies would end ruining the paint, isn't? Not like Ruby will clean it within the next decade, anyway

.
I think she conveniently left out a bunch of footage (because her dad likely did 98% of the work off-screen and Ruby just put a bit of paint on for the camera while being coached by Daddy Bones). She's putting on basic primer in the garage, then the desk worktop is magically painted with a coat or two of gloss paint when it's in her room.
I think gloss paint should hold up fine without varnish/sealer unless she's going at it with industrial cleaner and a scourer. Considering she never cleans her desk anyway, it should be okay with her usual 'lazily dab at a small section with a damp cloth every six months for a video' cleaning technique.
She'll 100% have that white desk covered in wax, ink and dead flies within a month or two though.
I'm more confused why she's rushed to shove her desk in while leaving holes in the wall everywhere where the old desk came out.
And she says she (or daddy) won't be painting the inside of the drawers because you won't see them, which is fine, but then the rest of the main body of the desk has been given just the most patchy, half-assed layer of primer and that's it. It looks like crap.
It isn't really much bigger than her old desktop either, and she has so much less leg room now that even her baby-sized school chair only just fits. The whole setup looks so uncomfortable.
Given how she’s claimed every part of that house as her own, I don't know why she didn't just tidy up their landfill of a library and put an adult-sized desk and comfortable grownup office chair in there so she's not 3 inches away from her screen and wrecking her spine. She could use the library as a filming space and office. She's often rambling about little space she has in her room and her fake need to separate her WAAAHRK space to help with SLYEEP HOYGENE, so why not just put an office in there?
I'm glad this video wasn't yet another routine or staged reading vlog, but it still seems incredibly fake in so many ways.
The way she keeps dropping the mask and losing her fake accent when talking directly to her mum just shines a light on how performative everything she does is.
And she can't help but cram in another forced, undeclared ad for Punky Fraternity products which she never uses and an endless ramble to mummy about how she NAVVER wants to encourage HOSSTLE COLCHA even though that's all she does.