Summary: 2 easy ways to insert video (movie) into PowerPoint 2007, play video in PowerPoint 2007.
With video inserted  into PowerPoint can surely add attraction to PowerPoint  presentation.
In this article, I will  introduce two methods on "How to insert a video into PowerPoint 2007".
Method 1: Direct insertionStep 1: On the 
"Insert" tab, point to 
"Movies", and then click 
"Movie from File".
 Step 2
Step 2: Click the video you want  to use and then click 
"OK".
Step 3:  After you click OK, you' are promoted with a message asking how you  want the movie to start in the slide show. I recommend you choosing  "Automatically "even if you want the movie to play when clicked. And  that's done.
Tips: 
1. This is the easiest way to  insert a video.
2. When playing the video that is inserted in this way in the PowerPoint,  it only shows the video thumbnail, and only has two control options: 
play  or 
stop. So you can't select the playing time freely.
3. Only video in formats of 
 AVI, MPEG and WMV can be inserted in this way.
4. Always put the movie in the 
same folder as your PowerPoint  presentation.If you later move the PowerPoint presentation to another  computer, copy the movie too. Keeping your movie in the same folder as  your presentation ensures the link will still work. However, you should  always test the movie on a new machine just to be certain. 
Re-insert the  movie, if necessary.
Method 2: Windows Media Player InsertionIf you want to view the  video in PowerPoint just like viewing in Windows media player, you can try this  insertion method.
 Step 1: Enable control. Because the default  state in PowerPoint 2007, control function is hidden, we need to enable it  firstly as follows:
1. Left click
" office button"  in PowerPoint 2007
2. Hit" 
PowerPoint options" to  open it
3. In the open box, select" 
Popular" tab, check the option that "
Show developer tab in the ribbon", at last click" OK".
Return to the PowerPoint  edition interface, there will be a new option-"
developer" on the toolbar.
 Step 2: Insert videos
Step 2: Insert videos.
1. Click" developer"  button to enter its menu layout
2. Select" 
More controls"  button in " control" area, there will pop up a dialogue box

3. In the dialogue box, select" 
Windows Media Player", click" OK" to close the dialogue box. Then the mouse will become"
+".
4. Drag the mouse, the player  interface of Windows Media Player will appear in the PPT.
5. Select the player  interface, right click, select" 
properties", a dialogue box will pop up.
6. Input the path and name of  video file in" 
URL" option.
An example of a file name is as follows:
C\:My video.avi
7. Close" properties" window, and you  have inserted the videos successfully.
Tips:1.This methods needs more options to insert a video.
2.When playing the video that is inserted in this way in the PowerPoint,it is actually playing in Windows Media Player,thus full control options are available: 
play, pause, volume or stop. So you can select the playing time freely.