Kindle e-books with audio and/or video – sideloading for testing not possible. Here is why.

Ama­zon recent­ly chan­ged sec­tion 6 of their publis­hing gui­de­li­nes in ver­si­on 2013.3.

Embed­ding audio and video in mobi files is now pos­si­ble. The descrip­ti­on and sam­ple code on how to do this is com­ple­te. Unfor­t­u­n­a­te­ly it does not men­ti­on how to test your file befo­re deli­ver­ing. I tried to side­load my files onto a kind­le fire. The files loo­ked fine, but did not dis­play any of my audio or video con­tent. I con­tac­ted ama­zon sup­port an got an inte­res­ting ans­wer on why this is the case.

Ama­zon uses the old KF-7 (sic!) for­mat for dis­play­ing embed­ded audio and video con­tent.

As of to date the new KF-8 For­mat does not sup­port audio or video. This means, if you side­load your ebooks to one of the Kind­le fires it will find the KF-8 ver­si­on of the file in the mobi packa­ge and the­re­fo­re not dis­play audio or video …

When the file is sub­mit­ted to ama­zon. They will par­se the file for audio and/or video con­tent and deli­ver a spe­cial­ly craf­ted mobi7 ver­si­on of this file to cust­o­m­ers with a kind­le fire. Sounds com­pli­ca­ted? It is inde­ed.

So how could you test your files?
The only way to test ist with kind­le pre­view­er set to iPhone/iPad mode. This mode dis­plays the KF-7 ver­si­on.