Better search: sorting by year

[hejjoe]

Sorting the search results by oldest or newest would be a great improvement.

[saerdnaer]

Please explain your specific use case aka the problem you are trying to solve with this request.

See also: #444

[hejjoe]

When I am searching for a specific topic e.g. 'linked open data' or 'wikidata' I want to be able to get faster to the lastest or oldest videos on this topic. The date of the recording is visible in the search results but I am not able to sort the search results by the displayed date.