What flash players are you using to play the swf without a browser?
I'm using the official flashplayers, got them from archives, but you can also get them directly from the archived adobe website with a bit more work
Get the original standalone flash player from the source
directly from the source so with no virus risks,
go to the archive of all the adobe flash urls downloads under
http://fpdownload.macromedia.com
That is
https://web.archive.org/web/*/http://fpdownload.macromedia.com/get/*
On the search box on the right "filter results by" type ".zip"
You'll get the list of all the archives for flashplayer installation, you can sort them by archive date or by link name
The zips contain all the versions of flash for all the operative systems, for windows, linux, mac. The zips are a bit burdensome, and the download from web.archive is slow.
Inside the .zip, among the .exe for windows, there are usually three versions, with this naming pattern:
flashplayerXrYYY_win.exe - is the installer for flash in the browser
flashplayerXrYYY_win_sa.exe - is the stand alone flash player, it requires no installation and it's ready to use
flashplayerXrYYY_winax.exe - no clue what that is
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