You can add a flash player to your site then link your own files to the player
- Go to Insert > Object > Objects > Flash Video
- Press ok
- Click to locate the video on your site
- Right click the player and select 'Link'
- In the Embedded Link field, edit this to point to your own .FLV file
- To adjust size:
- Right click the player
- Choose link
- Select 'Player Properties'
From here you can adjust size, loop, play automatically, as well as other setting.