Orbit Downloader,
an Internet Download Manager. It can grab embedded music or video
files, but that isn't so well done. There's a plug-in, Grab++ that is able
to do so nicely.
Apparently supports P2P as well, haven't test it out yet.
Edit: Works with P2P networks. Can download streaming videos as
well. Only tested on Youtube and Crunchy Roll.
Credits to my sister for playing this software. 
Those using Sunbelt Personal Firewall... you need to tweak the
firewall so that it doesn't block Grab++ when it attempts to
download the streaming videos or FLV files.
1. Open Sunbelt Kerio Personal Firewall
2. Select Intrusions on the left hand side
3. If the Enable Host Intrusion and Prevention
System box is ticked, click on the
Advanced button.
4. A new window will pop up.
5. Under Buffer Overflow, click on
Exceptions.
6. Add this 2 files in:
7. Click OK.
8. Repeat Steps 5 to 7 for the section Code
Injection.
9. Click OK all the way to apply the
settings.
Instructions for using
1. Open Orbit Downloader.
2. Click on Tools >
Grab++.
3. Refresh your Youtube or Crunch Roll video.
4. You will see a file called get_video.flv.
5. Tick this box and click on Download.
6. Then install FLV
Player to play it. If you have VLC Player, FLV Player is not
needed. Just play it directly through VLC Player.
