Chrome dev tool console says:
[blocked] The page at 'https://forge-allura.apache.org/p/allura/wiki/Videos/' was loaded over HTTPS, but ran insecure content from 'http://www.youtube.com/embed/6YbBmqUnoQM?feature=oembed': this content should also be loaded over HTTPS.
The [[embed
macro currently gets http URLs from youtube's oembed response. We should make them https so they can be served within https pages.
Closed #548.
je/42cc_7202