The second link you posted '/20160127052944/' is bad. It links to an old version, 1.681, and the current version is 1.711 as of an hour or two ago. The version number matters.

The url I posted and removed still works fine, so long as it's not originating from HN (i.e. 'referer' checking). If you do a quick web search on 'youtubedown' you'll find it.