Also, unsupported content warning was removed as of
nightly_2023-07-23, so it won't understand the option, and not on the web either. It does have a GUI though, so you might have issues with OpenGL colours (which also happens on Windows, even with latest NVIDIA drivers…). If you do have that and Vulkan produces skewed video, you're screwed.
UPDATE: additional info
Language: Java
if((_loc4_ = _loc4_.substring(_loc6_,_loc4_.length)) != "harry-lee.com" && _loc4_ != "notdoppler.com" && _loc4_ != "wanderlands.org" && _loc4_ != "kongregate.com" && _loc4_ != "newgrounds.com" && _loc4_ != "ungrounded.net" && _loc4_ != "armorgames.com")
(there is no ActionScript language, but Java is close)
According to this (from FFdec: midas.swf -> scripts -> <default package> -> Engine -> (deobfuscated) line 181), all seven domains should work with --spoof-url with or without HTTPS, although I recommend specifically
http://wanderlands.org because
that's what's displayed on the sitelock
If the GUI Ruffle was to be used (like that one I linked above), the top 24 pixels would need to be cropped, and any mouse inputs (not in this case) would need to be moved 24 pixels up if resynced to non-GUI (perhaps I should add that information in Encoding Guide / Video Dumping, but I would need to ask for the Editor role first)
The easiest way to obtain the SWF is from Flashpoint -- it has the same MD5 as used in this movie
As for the movie itself? A quite large improvement of 12.6 seconds over RTA, nice work!
UPDATE2: turns out that, as of
nightly_2023-08-03, you can disable GUI with --no-gui. Unfortunately, it's kind of a misnomer for hiding the menu bar, since you can still right-click for changing quality options and stuff, so the GUI and the OpenGL colouring issue are still there.