'Playing to the camera' (or, in theatre, to the audience) is a histrionic term: seeking to establish a direct relationship with the spectator through such devices as 'mugging', 'upstaging' and 'indicating' instead of maintaining all relationships inside the scene, with your fellow-actors. There are of course occasions and genres when this is perfectly acceptable; but for your common-or-garden-variety screenplay or stageplay it's a cardinal sin. Beyond the profession (The Profession!), it means trying to make yourself the center of attention.
'Faggot' now appears to be age-graded: most people older than about 30 or 35 would only use 'faggot' or 'gay' to denote a homosexual, but people in their 20s are using both as a generalized terms of contempt - which is very troubling for people of my age.