Are you a big fan of YouTube? If so, then you may endlessly spend the day looking for the newest and funniest video clips uploaded. As we know, the iPhone 4 lets us enjoy YouTube wherever we are. But the video quality of wi-fi gets me confused sometimes when the picture gets blurry and takes longer to load.

Well, thanks to YouTube to iPhone 4 Video Converter for Mac, we YouTube addicts now have our golden fleece. It provides easy solution to convert the download video from YouTube on Mac to iPhone 4 with high-quality output file and high conversion speed.
Apple is restricting Flash, but so for many videos downloaded from YouTube, or other online video sites like MySpace, Google Video, Yahoo!Video, Metacafe… are in FLV format. You can convert the FLV videos to iPhone 4 compatible format like MP4, M4V with YouTube to iPhone 4 Video Converter for Mac. It provides optimized presets for your iPhone 4 so you don't need to worry about the settings for your iPhone 4.
Note: If you are using Windows and want to download and convert YouTube files to iPhone 4, you can refer to Video Converter Ultimate for Windows.
Run Video Converter for Mac, drag the video files directly onto the interface. You can preview the videos and edit videos as you like.

Click "Format" and choose "iPhone Video (*.mp4)".

Click "Settings" Choose "H.264 For iPhone(MC)" and all parameters will be automatically set for h.264.

After choosing the format, you just need to click Convert button to start the task.
When the conversion is done you can upload the output videos to your iPhone 4g, iPhone 3gs, iPhone 3g and enjoy it any time you like!
Tips: If you're looking for a program which enables you to rip DVD to iPhone 4, convert audio & video to iPhone 4, and edit video in one-stand way, check this packed Video Converter Pro for Mac.