notes for Isolating objects, censoring video in premiere:
effects -> Video Effects -> Keyring -> Eight-Point Garbage Matte go to effects control panel -> click on Eight-Point ... then select the clip, cmd-c, clip on top layer, cmd-v (make sure top layer is GREY or targeted) in effects window, search for mosaic Video Effects -> Stylize -> Mosaic drag it onto the top clip effects control -> adjust horizontal and vertical blocks