Quicktip:
----------
This isn't a quicktip really!! There is a way around in Safari to download youtube videos, this tip details those steps, however it has two parts to it. The first part is via macosxhints.com, the second part, which is an extension to it, is my discovery ( okay a pussy cat discovery..).
Before I begin let me make it clear that this isn't a neat and simple way, when compared to firefox, but it works!!
part 1:
In Safari, open youtube and click the video you want to download. Now open the Activity Monitor by pressing cmd+option+A. Activity Monitor has a line for every tab opened in Safari, click the one which says about youtube. Actually you need to click on the small arrow before the line to reveal tons of info about the page. In that line look for a line that ends with flv and since the video is playing in the background its size will keep increasing.
Just double click that flv line and your flv video should start in Safari's download window.
Check in the Safari's download window by pressing cmd+option+L. You should see your video downloading...
While this works great, this doesn't work for all the flash video ( flv/swf ) websites. Here is my extension to this hint that will enable you to download flash videos for any websites. I checked for 11 video sites and it worked in all of them
part 2 :
In Safari, open the video site of your choice and click on the video. As the video starts to play open the activity monitor, look for that flv/swf line, double click it. When you double click on the flv line in AM, a new Safari windown opens with some garbage text. let the window finish loading the garbage text completely. Once its done, press cmd+s to save it. It will most probably save it with an .dms extension. Rename it to .flv or .swf. And enjoy.
I don't have a teacher way of explaining things but trust me the entire process is easy..
@goobi
Thanks for your link. I will try it and report back..
@aryayush
The script that you said doesn't really work for me. Did it work for you ??