Can no longer download from History.com

[EricxDu]

Downloading from History.com worked for me last year, but it seems things have changed and it no longer works.

youtube-dl http://www.history.com/shows/vikings/season-3/episode-2
[aenetworks] episode-2: Downloading webpage
[ThePlatform] 1d4gD91waTnn: Downloading SMIL data
[ThePlatform] 1d4gD91waTnn: Downloading m3u8 information
[ThePlatform] 1d4gD91waTnn: Downloading JSON metadata
WARNING: Your copy of avconv is outdated and unable to properly mux separate video and audio files, youtube-dl will download single file media. Update avconv to version 10-0 or newer to fix this.
[download] Destination: The Wanderer-1d4gD91waTnn.mp4
WARNING: Your copy of avconv is outdated, update avconv to version 10-0 or newer if you encounter any errors.
avconv version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav developers
  built on Mar 16 2015 13:20:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
[https @ 0x8b8e180] HTTP error 403 Forbidden
Unable to open key file https://os-vh.akamaihd.net/i/AETN-History_VMS/BRAND_THC_VIKG_157200_TVE_000_2398_60_20150220_000_S3_2500.mp4,,.csmil/crypt.key?null=&id=AgBIwKbzFz3DZQGaxlbGtJIe5rYBUPGiCX37Z4gU2gtP%2f5EGZqW9aOEBXOMItZkcWHpHqYaZy2fLtA%3d%3d&hdntl=exp=1455942529~acl=/i/AETN-History_VMS/BRAND_THC_VIKG_157200_TVE_000_2398_60_20150220_000_S3_2500.mp4*~data=hdntl~hmac=d0be9851a16bd04428ef4f2450d3922a038c09011fb8c8cfc5a6f80511adc67a
[http @ 0x8b97480] HTTP error 403 Forbidden
[crypto @ 0x8b8e180] Unable to open input
https://os-vh.akamaihd.net/i/AETN-History_VMS/BRAND_THC_VIKG_157200_TVE_000_2398_60_20150220_000_S3_2500.mp4,,.csmil/index_0_av.m3u8?null=&id=AgBIwKbzFz3DZQGaxlbGtJIe5rYBUPGiCX37Z4gU2gtP%2f5EGZqW9aOEBXOMItZkcWHpHqYaZy2fLtA%3d%3d&hdntl=exp=1455942529~acl=%2fi%2fAETN-History_VMS%2fBRAND_THC_VIKG_157200_TVE_000_2398_60_20150220_000_S3_2500.mp4*~data=hdntl~hmac=d0be9851a16bd04428ef4f2450d3922a038c09011fb8c8cfc5a6f80511adc67a: Input/output error


ERROR: avconv exited with code 1

[remitamine]

WARNING: Your copy of avconv is outdated, update avconv to version 10-0 or newer if you encounter any errors.