Unable to download embedded news.com.au's HTML5 videos.

[antdude]

$ youtube-dl -v https://www.news.com.au/technology/innovation/inventions/china-looks-to-bolster-surveillance-network-with-birdlike-drones/news-story/fbef8af0169a08cb64ebddbf6cf44981
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.news.com.au/technology/innovation/inventions/china-looks-to-bolster-surveillance-network-with-birdlike-drones/news-story/fbef8af0169a08cb64ebddbf6cf44981']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.06.25
[debug] Python version 3.4.2 (CPython) - Linux-3.16.0-6-amd64-x86_64-with-debian-8.11
[debug] exe versions: ffmpeg 3.2.10-1, ffprobe 3.2.10-1, rtmpdump 2.4
[debug] Proxy map: {}
[generic] fbef8af0169a08cb64ebddbf6cf44981: Requesting header
WARNING: Falling back on generic information extractor.
[generic] fbef8af0169a08cb64ebddbf6cf44981: Downloading webpage
[generic] fbef8af0169a08cb64ebddbf6cf44981: Extracting information
[download] Downloading playlist: China looks to bolster surveillance network with birdlike drones
[generic] playlist China looks to bolster surveillance network with birdlike drones: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
[youtube] nnR8fDW3Ilo: Downloading webpage
[youtube] nnR8fDW3Ilo: Downloading video info webpage
[youtube] {43} signature length 40.42, html5 player vflpusdz-
[youtube] {18} signature length 40.42, html5 player vflpusdz-
[youtube] {36} signature length 40.42, html5 player vflpusdz-
[youtube] {17} signature length 40.42, html5 player vflpusdz-
[youtube] {135} signature length 40.42, html5 player vflpusdz-
[youtube] {244} signature length 40.42, html5 player vflpusdz-
[youtube] {134} signature length 40.42, html5 player vflpusdz-
[youtube] {243} signature length 40.42, html5 player vflpusdz-
[youtube] {133} signature length 40.42, html5 player vflpusdz-
[youtube] {242} signature length 40.42, html5 player vflpusdz-
[youtube] {160} signature length 40.42, html5 player vflpusdz-
[youtube] {278} signature length 40.42, html5 player vflpusdz-
[youtube] {140} signature length 40.42, html5 player vflpusdz-
[youtube] {171} signature length 40.42, html5 player vflpusdz-
[youtube] {249} signature length 40.42, html5 player vflpusdz-
[youtube] {250} signature length 40.42, html5 player vflpusdz-
[youtube] {251} signature length 38.42, html5 player vflpusdz-
[youtube] nnR8fDW3Ilo: Downloading player https://www.youtube.com/yts/jsbin/player-vflpusdz-/en_US/base.js
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[debug] Invoking downloader on 'https://r2---sn-a5meknlz.googlevideo.com/videoplayback?clen=6655423&expire=1529995670&gir=yes&mt=1529972751&pl=14&ei=NY0xW4yuPNHc-wOspJfADQ&itag=135&mime=video%2Fmp4&aitags=133%2C134%2C135%2C160%2C242%2C243%2C244%2C278&c=WEB&initcwndbps=1423750&requiressl=yes&keepalive=yes&sparams=aitags%2Cclen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&ipbits=0&ip=45.50.15.139&key=yt6&lmt=1529894861400270&fexp=23709359&source=youtube&mv=m&fvip=2&ms=au%2Conr&mm=31%2C26&mn=sn-a5meknlz%2Csn-q4fl6nlz&id=o-ANa1Lcm2yHXLQLbN-BjyBTvpVaxknAgu06Z5sM4GJ2DC&dur=107.680&signature=03AC9AA3215336B49A22FD172B29C87DC1639EA9.B40A3DAF5426304B540F882A1E7BF4D54C57F029&ratebypass=yes'
[download] Destination: Festo - SmartBird-nnR8fDW3Ilo.f135.mp4
[download] 100% of 6.35MiB in 00:00
[debug] Invoking downloader on 'https://r2---sn-a5meknlz.googlevideo.com/videoplayback?clen=1710836&expire=1529995670&gir=yes&mt=1529972751&pl=14&ei=NY0xW4yuPNHc-wOspJfADQ&itag=251&mime=audio%2Fwebm&c=WEB&initcwndbps=1423750&requiressl=yes&keepalive=yes&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&ipbits=0&ip=45.50.15.139&key=yt6&lmt=1529895628328616&fexp=23709359&source=youtube&mv=m&fvip=2&ms=au%2Conr&mm=31%2C26&mn=sn-a5meknlz%2Csn-q4fl6nlz&id=o-ANa1Lcm2yHXLQLbN-BjyBTvpVaxknAgu06Z5sM4GJ2DC&dur=107.741&signature=ADE905291A0E4490B051EC375F5982DE27F125BA.78BA42938B8585C705ADF33F7DD3B5876758E9&ratebypass=yes'
[download] Destination: Festo - SmartBird-nnR8fDW3Ilo.f251.webm
[download] 100% of 1.63MiB in 00:00
[ffmpeg] Merging formats into "Festo - SmartBird-nnR8fDW3Ilo.mkv"
[debug] ffmpeg command line: ffmpeg -y -i 'file:Festo - SmartBird-nnR8fDW3Ilo.f135.mp4' -i 'file:Festo - SmartBird-nnR8fDW3Ilo.f251.webm' -c copy -map 0✌️0 -map 1🅰️0 'file:Festo - SmartBird-nnR8fDW3Ilo.temp.mkv'
Deleting original file Festo - SmartBird-nnR8fDW3Ilo.f135.mp4 (pass -k to keep)
Deleting original file Festo - SmartBird-nnR8fDW3Ilo.f251.webm (pass -k to keep)
[download] Finished downloading playlist: China looks to bolster surveillance network with birdlike drones

It only downloaded that embedded YouTube video, and not the other videos. :(