With the warning for publishers, advertisers and developers to migrate away from Flash comes a message to become more comfortable with HTML5 SDK, as the company ends support for IMA SDK in Flash and support for Flash VPAID (Video Player Ad-Serving Interface Definition) ads in the HTML5 SDK.
Busolits explains that the company will not actively prevent ad-serving to the Flash SDK, but new releases will stop after June 1, 2017, and Google will no longer fix bugs or answer support questions. If playback stops working for the Flash SDK, Google will not fix it.
In November 2016, Google published two more deadlines, as it moved forward with phasing out the use of Flash. Starting April 3, 2017, advertisers will no longer have the option to upload new Flash video ads into DoubleClick Studio, DoubleClick Campaign Manager, DoubleClick Bid Manager, DoubleClick for Publishers or AdWords.