"I want to play around with iMovie, but don't have any video. I tried importing some shows I purchased on iTunes, but they won't import. Is there a way to do it, or is it being blocked by the system for some reason?" ---- Mac Rumors
Movies purchased from iTunes are often copy-protected, to import purchased iTunes movies to iMoive, your computer must be authorized(using iTunes) with the account that was used to purchase the video. Then, use a professional Video Converter for Mac to convert iTunes movies to iMovie compatible videos.
Here, you can turn to iMedia Converter for Mac which can fast and best convert iTunes movies to iMovie compatible MP4 or MOV videos. Besides, it can also convert iTunes movies to other popular videos such as AVI, WMV, MPG, FLV, 3GP, MKV, RM, RMVB, VOB etc.
Step by step to convert iTunes videos to iMovie
Step 1. Load iTunes movies
Click "Add files" button to import or drag iTunes movies.
Step 2. Select iMovie .mp4 as the output format
Select profile drop-down list to choose ".mp4" as the output format. or select "Editing" -> "iMovie"
Step 3. Convert iTunes video to iMovie
When all settings are done, click "Convert" button to convert iTunes movies to iMovie