VID-202 Only pull the vid description on insert

Also, make sure we handle replacing the description properly.  There seems to be issues when a description header had no newline after it.
Look for double descriptions
VID-202 - Don't add empty description headers
Merge pull request #735 from Wikia/VideoSprint23-VID-202-DescriptionBeGone

VID-202 Only pull the vid description on insert