Ok so, МузТВ is kinda like the American Grammys and the МузТВ plate is the award that the winner gets, it's shaped like a huge plate and basically is a plate, so in the song he's kinda being all like 'yea this plate doesn't mean much to me, i'm gonna eat cereal out of it' because the music means more to him than the award and in the verse he's lowkey dissing on the artists that make songs that are just advertising random things because instead of writing songs from the heart, they're doing it fr the money.
Second - the line 'Остальное как то по хую' doesn't necessarily mean 'The rest doesn't fucking matter' I just can't figure out another way to translate it because 'хуя' essentially means dick so if you're russian and have any other idea of how to translate this line - let me know