HA! I got the thumbnails to work but only after switching to Mark Harding's version of iZap videos. found here: http://community.elgg.org/pg/plugins/project/384865/developer/markharding93/izap_videos-with-better-video-player?annoff=50
I don't know why this version works but it does.
good to hear that my protege's version of izap video works fine w/ the thumbnails - he's only about 15 years old lolz ;-P He's been busy with other things.. so most likely you won't hear from him too soon ;-)
The explanation why it works with "izap_videos with better video player" is quite simple... this plugin is based on version 1.5 of izap_videos. It has been updated over a year ago for the last time. The same with "3 column riverdashboard": updated 286 days ago.
I guess version 2.5 of izap_videos will also still work with the "3 column riverdashboard" plugin. I've never used the "izap_videos with better video player" myself. I only know that the original izap_videos plugin in version 2.5 (maybe in version 1.5, too) had a bug that resulted in video files not getting deleted from the server when you delete them from the site. Also the original files were always saved too in addition to the converted files.
Of course, most importantly the plugins you use have to work together. The question is if they still fully work on Elgg 1.7+ (security tokens). The izap_videos plugin in the latest version does and also a few new featured and options have been implemented. And at least all the bugs I found and reported have been fixed.
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