On Aug 12, 2017 10:13 AM, "Ted Roche" <tedroche@gmail.com> wrote:
Ultimately, my goal is to post some SWF files to Youtube.

An acquaintance created a series of screen-capture and audio-narration
video tutorials that produced SWF files, and would now like to post
them to YouTube, which doesn't appear to accept the SWF format.

Often these sorts of Flash files just embed an flv or mp4 video file with a player. If that's the case you could extract the video file with the swfextract utility in the swftools package from rpmfusion.