Lots of detail will show.
High definition video shows a greater amount of detail than SD video. At it’s best the frame size is just a bit smaller than frame size of 2k digital film scan. Such resolving power will show more unforgiving detail.
Complexion imperfections, poor makeup and damaged costumes may all be visible in the frame. Every working practice which applies for motion picture costume and makeup is viable in HD production. More attention to detail is necessary.