“Abbott Elementary” star William Stanford Davis joined the acting chorus Friday and offered a firsthand look at the real residual paychecks he’s received as a working actor. The act was meant to emphasize one of the main issues that led to the SAG-AFTRA strike earlier this month: minuscule residual payments in the broadcast age. In the video, Davis revealed a couple of actual residual checks that were worth just pennies: 3 cents and 5 cents. “I want to give you an example of what a residual check looks like,” Stanford said in a video circulating on TikTok and Twitter, upping the 3-cent check to . . .