This is a guide to tell you how to capture flash video on Mac OS X. At first, download this free trial version on your mac.
Step 1: Download YouTube Videos Opened in Safari.
Launch Safari and go to YouTube.com. The Download button will show up at the top left corner of the video when it is detected on the webpage.
Go to download menu and choose Enter a URL, then click OK. select your video website URL, and paste it to above URL area.
as following interface show:
Step2: View downloaded video.
Click Library on the left side of the Capture Flash Video Mac to see the downloaded videos on the right. Double-click the item to view or play it with the built-in FLV player.
Major Functions of Capture Flash Video Mac
Download YouTube Videos and More
Capture Flash Video Mac assist us easily download online videos from a wide range of popular video-sharing websites like YouTube, Yahoo, Break, Metacafe, Facebook, etc. for playback on Mac or any popular video players you like
FLV Video Conversion on Mac
Quickly convert downloaded videos or FLV videos on your hard drive to MP4, WMV, MOV, AVI, and more. You can also save songs from music videos to MP3 for your iPod.
Convenient FLV Playback
Capture Flash Video Mac allows you to play the downloaded videos and FLV format videos stored on your Mac with embedded FLV video player conveniently. Just double click the downloaded video in "Library" to play the videos.
Convert Directly for Apple Devices
Directly convert downloaded videos for iPod, iPhone, Apple TV and more. This smart app automatically determines the optimized file format, bitrate, and resolution for the selected target device.
Integrated with Safari
Automatically detect videos when the video starts to load in Safari, saving you time of waiting the video to load fully. Click the prompt "Download" button and the wizard will do the rest for you.
Watch, Download, and Convert Concurrently
Let it run background to do the task of video downloading and conversion, and watch more videos on YouTube. Add new videos to the download queue with a single click.
Convert Flash for iMovie
Convert downloaded videos directly for editing applications like iMovie, FCP, and you can create your own masterpiece.
References 
Supported Websites |
| YouTube, Facebook, TNT, Bing video, Yahoo video, Google video, BREAK, TwitVid, TeacherTube, RuTube, Photobucket, VEVO, Funnyordie, Expotv, Engagemedia, Archive, CNN, Metacafe (Hulu video excluded) etc |
Supported Output Devices |
Apple Device |
iPod touch, iPod nano, iPod classic, iPhone, iPhone 3G/3GS, iPhone 4, iPad, Apple TV, Apple TV 2nd generation |
Apple Software |
iDVD, iMovie, Final Cut Pro |
Game Console |
PSP, Playstation 3, Nintendo Wii, Xbox 360 |
Portable Players |
Walkman, Creative Zen, Archos, DV, Sandisk, DELL Axim |
Mobile Phone |
Android, BlackBerry, Nokia, Palm Pre, HP iPAQ, HTC |
Supported Input Format |
| FLV |
Supported Output Formats |
Video |
MOV, M4V,MP4, WMV, ASF, MKV, AVI, FLV, F4V, TS, TRP, MPEG, VOB, 3GP, 3G2, SWF |
Audio |
MP3, M4A, WAV, M4R, AC3, AAC, OGG, APE, MKA, AU, FLAC, CAF, SD2, AIFF, WMA |
HD Movie |
HD MOV, HD MPEG, HD MP4, HD TS, HD TRP |
free trial version 
Price: $29.00 
How to Capture Flash Video on Mac?
