I've downloaded some youtube video, converted them to mp4 and I'd now like to transfer to my iphone through itune I can't find anything that explains this on internet. So is it possible (without buying some software)?
Just drag the file into the iTunes window or go to "File" -> "Add file to library". Then select the mp4 file.
Next, go to your iPhone's page by clicking it on the left. Now there should be a tab that says "Video". There, select to sync the video you added to iTunes.
According to Apple's official website, iPad/iTunes is only compatible with H.264, MPEG-4 or Motion JPEG video format with the following specifications:
If the MP4 video is not in the above technical specification, you will fail to transfer MP4 to iTunes or fail to play MP4 on iPad or iPad2.
protected by slhck Aug 21 '13 at 11:41
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