Hello,
Please, allow to specify site-relative urls to already uploaded files on site. Add additional %VIDEO_URL% key to configuration of discussion topic so we can extract specified url to file. Correct other links provided by existing keys to site-relative (for example category link) for opportunity of easy change of site address.
https://yadi.sk/i/SZj8_det3WspPrhttps://yadi.sk/i/bVTJ2x5e3WspfC