You may need some third-party software tools for this conversion. For example, you could use Moyea SWF to Video Converter Pro to convert SWF files to some other popular video formats. You can check more in this post:
https://www.leawo.org/tutorial/how-to-download-swf-files-and-play-in-swf-player-1077.html?tw=#1389
Answered Mar 19, 2019
Edited Mar 19, 2019