GitLab

Main page does not contain profile videos anymore

I didn't add a test case as the one in #10682 looks like a copyrighted
product.

- Eliminate segment_urls and initialization_url
+ Introduce manifest_url (manifest may contain unfragmented data in this case url will be used for direct media URL and manifest_url for manifest itself correspondingly)
* Rewrite dashsegments downloader to use fragments data
* Improve generic mpd extraction

In order to better emphasize it's relation to Adobe Pass