How to show thumbnail of a asp.net website on facebook? - asp.net

I developed a Asp.net website that play youtube videos on one page. I hosted it in windows Azure recently. But if I took a url of a page which play video and post it on facebook then facebook doesn't show any thumbnail. Can any one help me pls ?
to understand my needs you can post both of the following urls to facebook.
http://hiruvideos.hirufm.lk/index.php?page=videos-watch&id=1705
http://mostamazingvideos.azurewebsites.net/PlayVideos.aspx?uid=1
Second one doesn't show any thumbnail.

You are missing the Facebook Open Graph meta tags that tell Facebook what image to show when somebody shares the link to your website. Follow the best practices at https://developers.facebook.com/docs/sharing/best-practices (Section 3 talks about the meta tags).

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When I share links of other websites it pulls the preview (featured image) of the web page but when I share any Facebook post on the website it does not do the same.
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Image : Facebook post preview not showing up
You have to integrate facebook with your website first
please Refer to
https://wordpress.com/support/facebook-integration/#publicize-to-facebook

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Thanks.
You can find a detailed tutorial on how to integrate the Facebook Like Button with Wordpress on my blog here:
http://abecoffman.com/2011/advanced-wordpress-like-button-integration/
If you follow the steps you should be able to add the XFBML tags anywhere in your theme.

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