iPhone 4S keeps the same Adobe flash player lack, so to convert FLV files especially YouTube FLV files to iPhone 4S is still the issue we must deal with. As FLV has strong advantage in video on-line playing as a streaming video format, we can see its appearance among YouTube, Hulu, Google video etc.
And the point we just care here is how to convert the FLV files to iPhone 4S. Of course we need the help of a third tool. And FLV to iPhone 4S Converter for Mac is existed for you to convert Apple incompatible FLV files to iPhone 4S as easy as possible.
Import FLV videos to FLV to iPhone 4S Converter from your PC HD drive by licking "Add File" button.
To set iPhone 4S supported format as output.
Go to HD option------Set H.264 1080p/720p
Go to iPhone option ----Set MP4 480p
Click "Start" button to begin FLV to iPhone 4S Conversion.