How do you delete videos from your sony handycam DCR-DVD405

This Sony camcorder uses mini-DVDs to record and there are certain restrictions when DVD is used, it is not like videotape. For a DVD-R disc, you cannot delete video once it is recorded because this type of disc is a record once only. Depending on which other disc type you use and how it was initialized, you MAY be able to delete video. For a DVD+RW disc, or a DVD-RW disc initialized in VIDEO mode, you can delete the last scene IF you have not removed the disc and not recorded any new video. For a DVD-RW disc initialized in VR mode, you can delete anytime. And here is how:
Turn on camcorder and press PLAY. Select the video or still image tab that contains the data you want to delete. Touch EDIT. Touch DELETE. Select what you want deleted. The selected scene is marked with a checkmark. Press and hold the image on the LCD screen to confirm. Touch RETURN to go back to previous screen. Touch OK - YES. You cannot recover data once deleted. There is also a DELETE ALL to delete all video or images.