We are developing an application in which user uploads the content and media in the form of image/video. The media gets stored in Azure. As mentioned in the share API, we are just passing the link as a part of the comment. Although the image is visible, it is seen as a link, which on clicked opens in another window.

In case of video, no preview is visible. It is seen just as a link.
The API we are using is:
https://api.linkedin.com/v1/people/~/shares
Is there any other API for this which is part of Partner Program?