Failed to publish video content after site move

Hi,

I moved my D7 site with backup and migrate module to another server (document root is different, server hostname is different), but I use the same URL to access my site. After that I realized Video conversation is not working properly, but it was OK before the move.

1.) I can upload video to D7 and click on submit button
2.) I can see the successful conversion on Zencoder site, and Zencoder successfully upload my converted video to my site
3.) In the D7 files folder I can find the required video files and thumbnails as well, but I got the following error if I try to visit the video node in D7:

Error: The video conversion process has failed. You might want to submit a simpler video format like mpeg or divx avi.
If the problem persists contact your website administrator. Please check logs for further debugging.

If I open the video node for editing, it also looks OK. I can see thumbnails, files with correct size and names, paths. If I download the original and converted video, then I can play those with video player on my desktop.

There is no error in D7 logs, and I tried to clear D7 cache multiple times, executed cron several rimes... Also I checked the file permissions, and it looks OK.

Could you please give me some idea how could I continue the troubleshooting? I have the latest version from Drupal + PHP Version 5.4.4-14+deb7u8.

Thanks,
otto

PS: There were one change in video module's config after the move. I changed the "Postback URL for Zencoder" from https://www.SITE.NAME/postback/jobs to http://www.SITE.NAME/postback/jobs.