Make sure you’ve enabled the feature in component’s options.
- Go to Components-> DJ-Classifieds in Joomla backend and click Options
- Open the "Global" tab. Scroll down and in section "Advert Specific Settings" find the "Use Video" selector and set it to "Yes". Click Save & Close.
- Now users can add a video to their adverts.
- Video will be visible in detailed information.
Video could explain more: