Browsing the videos saved on your Mac's hard drive is quick and easy now that Cover Flow has been incorporated into Finder. You barely need to look at filenames any more — just flip through the thumbnails and choose what you're looking for visually.

When Mac OS X automatically generates thumbnails for your videos, sometimes it gives you a dud. Since Mac OS X usually generates thumbnails based on the first few frames of a video, you may occasionally be left with a thumbnail that's not very useful for speed browsing. If you want to choose a frame that better represents the contents of a video, it's easy to do using video converter for Mac or QuickTime.

Here's how choose your own video thumbnails in Mac OS X with QuickTime:

1. Open the video file in QuickTime and navigate to any frame of your choice.
2. Once you have chosen a frame, copy it by either pressing Command+C on your keyboard or going to Edit > Copy in the menu bar.
3. Go back to Finder where the video is located and right-click on the file. Choose "Get Info" from the menu.
4. In the small window that comes up, you will see an icon in the upper left corner. Select the icon and paste your copied video frame by pressing Command+V.

But Quicktime can not fully support some videos such as M2TS, MOD, MKV, etc. You need to suffer the slings and arrows of the many inadequacies of Quicktime unless use video converter for mac to convert the videos.

You can capture images easily from any videos such as M2TS, MOD, MKV, FLV, MPG, WMV, MKV, MPEG, MP4, 3GP, 3G2, MOV, AVI, M4V, etc by clicking the "snapshot" button while previewing the movie with this wonderful Mac video converter. Then you can use it as your own video thumbnails in Mac OS X.

If you want to choose your own video thumbnails from DVD, DVD Ripper for Mac can help you capture images from DVD as your own video thumbnails.