Middle class to me is a property owner, kids in private school, a good salaried employment/business owner, educated to a good standard etcAssuming she makes at least in the very high 30ks from youtube, then yes, she is. In her area, at least. Standard middle class in the US ranges from 40k to 120k, but it depends on the area, and could skew a bit higher or a bit lower. Podunk nowhere, 35k. Major Major metro? 150k.
ETA: that doesn't mean she's not still white trash.
To me she's just a chav - thick, idle, tacky, no social graces etc...the equivalent to "trailer trash".