[ZRH-2017] add vimeo videos to speakers

[Roderick-Jonsson]

Added the vimeo links to the speakers but it seems that they don't show up on the speaker page. Can someone comfirm this problem?

[bridgetkromhout]

Thanks for reporting this bug. When my fix in devopsdays/devopsdays-theme#543 is merged and a new version released, this PR will be almost right except that since this needs embed URLs you'll want to just have the ID number, not the full URL.

For example:
vimeo = "219025568"

Also, you can just use speakerdeck now:

speakerdeck = "https://speakerdeck.com/dodzh/d1-3-alvaro-videla-what-we-talk-about-when-we-talk-about-distributed-systems"

You don't need this kind of link now that speakerdeck embeds work:

slides = "https://speakerdeck.com/dodzh/d1-3-alvaro-videla-what-we-talk-about-when-we-talk-about-distributed-systems"

[Roderick-Jonsson]

Thank you @bridgetkromhout !

[mattstratton]

As soon as #2473 is merged, this should start working, so I'll merge it after the theme update passes the release.