1. Register on the site using the register button.
2. After complete registration, goto add button, click on Image for uploading pictures or click on media for submitting video links.
3. For images, complete the form and upload image by clicking the upload image button or you can paste the url of the image in image url field.

For Videos, complete the form and paste the video url as the exact sample url format shown below

4. Press submit to complete the submission.

Note:
Images can be uploaded, video links from Youtube, Vimeo, Vine, Facebook, Vk, Dailymotion, Metacafe, Instagram and audio links from Soundcloud can be submitted

Video url formats are:
For Youtube: https://www.youtube.com/watch?v=ZcAi5IL7UGc
For Vimeo: http://vimeo.com/12345678
For Vine: https://vine.co/v/Okased4rfid
For Facebook: https://www.facebook.com/video.php?v=123456789012345
For Instagram: http://instagram.com/p/asdWa4dsdr