Guide of YouTube Downloader for Mac tells you how to free download YouTube Videos and convert the Videos even your local FLV files to Mpeg, Mpeg4, AVI ,WMV.

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How to upload videos to YouTube easily and quickly on Mac
Google has released basic software called Vidnik which is the quickest, simplest way to make
movies using the built - in camera on your Macintosh and upload those movies to your
YouTube account. You must first sign up for a free YouTube membership to upload videos.
You can use Vidnik to create a video diary, or just to quickly record a video comment to attach
to an existing YouTube video. Vidnik works with the built-in video cameras on recent Macs,
with Firewire video cameras, and with many USB video cameras.
Part 1, use Vidnik to Record video segments using your iSight camera and upload them
to YouTube.

2. All rights reserved——http://www.youtubetoipod.org/
To use Vidnik, run the app, then click the record button to start recording. Click it again to
stop. Trim to just the golden moments you want to keep, as in the screen shot above. Fill in
the required title, description, and so on. Click the upload button. That's it.
Part 2, Use Vidnik to upload videos to youtube
You can drag movies made in other programs onto Vidnik's column of movies, then click the
upload button. And to use another program to do a little post-production, use the Gear menu
to show Vidnik's movie file in the Finder. Edit the movie in the other program, then upload it.
Vidnik can only support videos such as: 3GP, AVI, DAT, MOV, MP4, M4A, WAV, AAC. It
does not support ASF, FLV, MPEG, RM, WMV, MP3, AC3
You can use the best video converter for Mac to convert your videos to the formats that
Vidnik can run.
If you want to upload dvd to youtube, you need to use dvd ripper(for windows users) to rip
dvd to video formats supported by youtube first.