"The project has an MTV/Viacom component"...
Well it seems like a safe bet to guess that since the music video is being shot over the next 5 days it would have enough time to be edited in time for a release around the time of the VMAs (which is on August 20th which essentially a month away).
Last month Joey Harris (Janet's Senior Vice President) had meetings with MTV at Viacom Headquarters in LA. It doesn't seem unrealistic to think that Janet could possibly perform at the VMAs, have the music video premiere during the VMAs, or possibly both. Also that would be smart marketing on Janet and her team's part because she would be exposed to multiple audiences because the VMAs do tend to air on multiple Viacom owned channels (BET, VH1, CMT, Nickelodeon, etc.) in addition to MTV....Even though these Award shows don't get the viewership they once did there still will be millions watching.