From: https://github.com/ampproject/amphtml/blob/master/src/url.js#L314

Request
https://huntsongs-com.cdn.ampproject.org/v/huntsongs.com/video/ishq-karoge-to-dard-milega-video-song-ekka-raja-rani-govinda-ayesha-julka-kumar-sanu-alka-yagnik-udit-narayan-2437?pg=amp&amp_js_v=0.1
Referrer
https://www.google.co.in/
User agent
Mozilla/5.0 (Linux; Android 5.0.2; vivo Y51L Build/LRX22G; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/54.0.2840.68 Mobile Safari/537.36 Mobile UCBrowser/3.4.3.532
TypeError: Cannot read property 'origin' of undefined
at Ya (https://cdn.ampproject.org/rtv/021496877433269/v0.js:18:79)
at $a (https://cdn.ampproject.org/rtv/021496877433269/v0.js:19:49)
at $g.get (https://cdn.ampproject.org/rtv/021496877433269/v0.js:225:378)
at id (https://cdn.ampproject.org/rtv/021496877433269/v0.js:62:466)
at Le.Z (https://cdn.ampproject.org/rtv/021496877433269/v0.js:97:455)
at https://cdn.ampproject.org/rtv/021496877433269/v0.js:105:350
at String.replace (native)
at Se (https://cdn.ampproject.org/rtv/021496877433269/v0.js:105:54)
at Re.f.expandUrlAsync (https://cdn.ampproject.org/rtv/021496877433269/v0.js: 100:361)