Marketplace URLs are now ignored.
Some YouTube videos impose restrictions on which websites are allowed to embed them. This appears to be done by checking the content of the Referer header and/or accessing the iframe's parent. Because this add-on loads videos dynamically, some browsers such as Safari anonymize the origin of the request. In response, YouTube may refuse to serve the video and display a "Video unavailable" error instead. As a workaround, an option to use YouTube's default embed as been added. It will disable the lazy-loader and the miniplayer and it will allow YouTube to gather info about the parent webpage.

TL;DR: if YouTube videos don't load on Safari, check the "Use the default YouTube embed" option. Otherwise, don't.
This is a minor cosmetic update.
Also, embeds displayed in XFMG are kept to their original dimensions unless they're exactly 640 ✕ 360.
Added support for its new name GameClips.io
Also removed defunct site CollegeHumor.
New uploads are embedded via a native HTML5 player.
Old uploads still use the Flash player. Vocaroo doesn't seem to have an upgrade path for those.
Added support for Spotify podcasts.
Removed defunct site PlaysTV.
You don't need to upgrade if you don't use a proxy for outbound requests.