I found some nice little and simple freeware to convert movie-files to flash (SWF or FLV) by DVDVIDEOSOFT.COM.
SWF is supported by DavidWiki.
"Free Video to Flash Converter. Convert video files to SWF or FLV to publish video on your web site or blog.
Convert *.avi, *.mpeg, *.mpg, *.mp4, *.m4v, *.wmv, *.asf, *.mov, *.qt, *.3gp, *.3g2, *.dvr-ms. *.flv video files to ready for web *.flv and *.swf files.
This free program contains no spyware or adware. It's clearly free and absolutely safe to install and run."
I tested it successfully to load flash-animated scanresults to the Wiki. Works realy nice.