[blimey]

In the source of the video page;

http://new.livestream.com/accounts/1...events/3228592

There is a hls link like;

h..p://api.new.livestream.com/broadcasts/58207386.m3u8?dw=100&hdnea=st=1407064637~exp=1407065537~acl=/i/1164825_3228592_b7c1fdef_1@73929/*~hmac= <some code>

Using the entire string, including fresh hmac code, should work with ffmpeg. This is also what livestreamer uses with 720p_hls quality parameter.

If you want to use the url with "index_2320_av-p.m3u8" directly, you'll need to append fresh hmac code (from the end of the previously mentioned hls link from the page source) like this;

h..p://livestream-f.akamaihd.net/i/1164825_3228592_b7c1fdef_1@73929/index_2320_av-p.m3u8?dw=100&hdnea=st=1407031098~exp=1407031998~acl=/i/1164825_3228592_b7c1fdef_1@73929/*~hmac= <some code>

Value here also changes (in multiple locations), adjust it if you change hmac code;

1164825_3228592_xxxxxxxx_1@73929