creating custom field type to upload video files and store it in asset library

Hi,

I have a requirement below.

my custom page layout should have a column which should accept video files and on saving the page, it should save the video to the asset library.

if the user uploads the video only it should be shown in the display page else it should be hidden.

so i decided to create a custom field type to satisfy all these requirements.

Any help would be appreciated.

Aruna