.mov, .wmv, .asf, .rm, .3gp, .mp4, .swf, .dir, .dcr
These files type are supported out the box.
To play these file types you need to enter in the path to the file.
If your video is on the same webserver as drupal, you can use a path relative
to the drupal directory, like "downloads/video.mov".
If your video is on another server you can enter the URI to the video
like "http://www.example.com/videos/my-video.mov".
The .mp4 and .3gp extentions use the Quicktime player.
The .dir and .dcr extentions use the Director player.

If you need to add additional object parameters to swf or dir videos you
can enable the "Allow adding of parameters to object HTML" option. Then
in the video creation page you will be able to specify the parameters.

YouTube.com support
You can host videos on youtube.com and put them on your site.
To do this, after you upload the video on youtube.com enter
the video ID into the "Video File" field. If the URI youtube.com gives
you for the video is "http://www.youtube.com/watch.php?v=XM4QYXPf-s8"
you would enter "XM4QYXPf-s8".

Google Video support
You can host videos on video.google.com and put them on your site.
To do this, after you upload the video on Google video enter get the
the embed code. In this code you will find an attribute like
src="http://video.google.com/googleplayer.swf?docId=-1591729516923874694" .
You will need the -1591729516923874694 like number just after docId= .
Then use "google:-1591729516923874694" as video file value.

.flv
Video.module for drupal 4.7 now support Macromedia Flash FLV Videos
using FlowPlayer version 1.10 or above ( http://flowplayer.sourceforge.net/ ).
To use .flv files simply download Flowplayer and put the file
called "FlowPlayer.swf" or "Player.swf" into your Drupal folder.
Then set the Flash player file name to use on the Flash settings in video module configuration page.

.ogg
Ogg Theora videos, video.module uses the java applet cortado to display Ogg Theora files,
you can find the latest version of cortado at http://www.flumotion.net//jar/cortado/
get http://www.flumotion.net//jar/cortado/cortado-ovt-stripped-0.2.0.jar
and put it into your Drupal folder as cortado.jar
[
NOTE, at the time of writing, cortado.jar had a bug that caused it to fail with drupal.
you can get a patched version of cortado.jar that works from http://v2v.cc/~j/cortado.jar
and the bug related to this issue: https://core.fluendo.com/flumotion/trac/ticket/387
]