It might simply be a video posted in commemoration of the Hainan Island Incident where the J-8 played a huge role rather than a send-off video.The nerratives of this video sounded very much like words of appreciation for J8's many decades of service before its final departure from active service. Retirement of J8 has been expected for many years now.
The question now is what aircraft types will they be getting after J8 retires.