The major technique used to interact with any Smartphone is its touchscreen. Flash content like video assumes that the user have a mouse cursor that can click, hover and drag. There is no competition to this on any Android phone. If the user is trying to drag a video progress bar, for instance, they may just scroll the screen. Flash content button is also far and too small to use on touchscreen. Adobe tried to overcome from this problem by introducing full screen video with Flash. There was more failed push to obtain huge touch friendly video player interfaces in Flash content. But it wasn’t much interesting thing to the mobile user.
The battery life and performance issue was the most important vexing ones for Adobe. Flash was developed to run on desktop x86 systems. Lower powered ARM made Smartphone to perform well. Plug-in to function on ARM devices is like hammering a square peg into a round hole and it will be mess if that continuous. Adobe is not so small company, but it was failed to optimize the bits plenty to make video play acceptably. Even though the adobe tried hard but, flash never worked well on Android. It was impossible to find better test pages whenever there was a test made on Android from flash. It is dead on mobile but got place in the desktop world. For this reason flash websites are not working with Android as well as ISO.