I asked the same question, there were some interesting sessions I'd like to review and others I missed because they were concurrent. There should be more information on the Developer Blog soon. See Matt Marum's post here: http://developer.sugarcrm.com/2015/04/28/uncon-2015-was-a-success/
No video recordings this year! The environment didn't really lend itself to doing video recordings. But I am posting slides, code, and other materials soon. Still in process of collecting them (and going through all my SugarCon action items). As Francesca mentioned, stay tuned to the Sugar Developer blog.
In addition to the uncon presentations that Matt mentioned above, videos and slide decks from the rest of SugarCon are available at http://sugarcon.sugarcrm.com/.
