Can we create custom flash advertisement for Google ad-sense? like yahoo does? I tried on my adwords account but there is no way except followings,
1) Upload custom image advertisement.
2) Update the Google flash templates.
Google as far as I know does not have a inbuilt flash maker that will convert a series of images and sound to a Flash Compatible file, so with this said you will need to make your own. When you upload a image to Adwords you can see it says 'Acceptable Formats: PNG, JPEG, SWF and so on.. the important file format to take notice off here is .swf - this is a flash based file.
A lot of people use Adobe Flash Builder and Adobe Flash Professional when designing flash files for adwords through there are cheaper alternatives that I'll let you explore for yourself using the good old Google Search.
Adwords will however convert your flash to HTML5 compatible devices Source: