I fianally found a good way to share and download a video from Niconico Douga!!

Here is the url you want to visit to view, share, and download the video.
http://nicodown.dip.jp

When you visit this site, it will show some video from Niconico Douga that may interest you.    You can click on the categories that interests you to look for videos.

If you have the url of the video you wish to see, then simply copy that url in to the textbox near the top, which looks like below.

Once you have entered the url and pressed the  “Send” button, It will take you to a new page in which it will let you view the video.  If you wish to share this video, simply give the url inthe address box to your friend.

If you would like to download the video, you will need to wait until the video is fully downloaded to your computer.  Which means that you need to wait until the pregressive bar has turned all white.  You can see the progresive bar once you hover over the video.

Wait until the bottom bar s like the image below.

Once the bar is all white, click on the link that looks like below.

The above link is beneath the video.  If you can’t find it, please reference the image below.

I hope this will help you watch and share some funny vids on Niconico Douga!