Break

Delete everything after </iframe>, wrap in <div class="video-frame">.

Source: Break

Brightcove (Consumer Reports)

Wrap in <div class="video-frame">.

Source: Consumer Reports

Comedy Central

Delete everything after </iframe>, wrap in <div class="video-frame">.

Source: Comedy Central

Facebook Post

Stylin'. Who's buyin'? #lgwatchurbane #androidwear #smartwatch #urbane

Posted by Android Central on Wednesday, May 6, 2015

Source: Android Central (Facebook)

Facebook Video

LG G4 hands-on review!

The LG G4 is officially official, and we're here to walk you through this hot little number! We've got all you need to know at http://phon.es/lgg4

Posted by Android Central on Tuesday, April 28, 2015

Source: Android Central (Facebook)

Funny or Die

Delete everything after </iframe>, wrap in <div class="video-frame">.

Source: Funny or Die

Google Maps

Change width="600" to width="100%".

Source: Google Maps

Google+

Copy entire provided embed code and insert it in one spot. If embedding multiple posts, put the <script> line in only once.

Source: +AndroidCentral

Google Sheets

Add style="width:100%; height:500px; border:1px solid #ccc;" to the iframe.

Source: Google Sheets

Infogram

Delete the links at the end (<a target=blah blah up to the last </div>). To scroll, wrap in <div class="scrollbox">.

Source: Android Central

Instagram

The venerable @philnickinson at work.

A photo posted by Derek Kessler (@derekakessler) on

Source: Derek Kessler (Instagram)

Kickstarter

Wrap in <div class="video-frame">.

Source: Pebble Time (Kickstarter)

Polldaddy

Source: Windows Central

SoundCloud

Twitch

Delete everything after </iframe>, wrap in <div class="video-frame">.

Twitter

Source: @TMobileAtWork

Vine

Source: Vine

What do you mean "wrap in a div"?

This:

<div class="video-frame">
<iframe all that gobbledeegook you copied from the site></iframe>
</div>

I've got this thing that's not on here… what do I do?

If the embed has an <iframe blah blah blah in it, copy that and wrap it in <div class="video-frame">. If it's a live stream without an embed code, try digging into the code and finding the iframe there. If all else fails, call Derek.

I'm still confused

It's okay. Ping Derek on Slack. This is all his fault anyway.