CYB-377 Youtube URLs are not always https

* changed the regular expression where it matched the protocol to always match
    http:// or https://
* This will ensure that Youtube videos are handled as such.

https://jira.ets.berkeley.edu/jira/browse/CYB-377
Merge branch 'match_youtube_http_not_s' of https://github.com/coyote/datacultures into match_youtube_http_not_s
Merge branch 'master' of https://github.com/ets-berkeley-edu/datacultures into match_youtube_http_not_s
CYB-377 - Whitespace fix