Enrichen video displays + correct colour in search

[felipegaucho]

• Correct the background colour to match the design.

VS: https://xd.adobe.com/spec/6e9bbad0-7d91-41e4-bc51-a1f31ff57882/#screen/81e820ab-bbb3-42d9-8b25-f4c30ccfa23f/search-future-needs1920

• Implement "author name" (check if Make the "author" field for video uploads be filled automatically #530 is resolved) and "published on", for each video.
• Increase size of video duration box

[bent0b0x]

@felipegaucho I've fixed the background color and changed the duration font size (both on staging now or very soon). If you want either of them tweaked further just let me know!

[felipegaucho]

Very nice @bent0b0x, LGTM, only missing thing is the "author" (username).

Guess it depends on solving #558 and pushing the whole profile to production, so feel free to break it down into a separate issue and close this one if you wish.

[bent0b0x]

Yup I don't think #558 is finished, I'll likely move the author field in search to a separate issue soon

[bent0b0x]

Closing in favor of #561