Video footage came from Citra Nightly fd30d48 at 1.5x native internal resolution (600x720).
Audio was ripped directly from 3DS due to Citra lacking an audio dump option.
Citra, thanks to ShinyQuagsire, finally supports update data. If you have a hacked 3DS (Boot9Strap recommended), what you do is use GodMode9 to rip the update(s) to CXI and rename it to 00000000.app and place it in -userdirectory-\sdmc\Nintendo 3DS\00000000000000000000000000000000\00000000000000000000000000000000\title\0004000e\-targetgameid-\content\ (example, the target game id for the North American release of Smash 3DS is 000edf00.
If you want to access your replays on Citra, what you do is install JKSM on your 3DS, and use it to dump your extdata from any game you wish, so you can put it in -userdirectory-\sdmc\Nintendo 3DS\00000000000000000000000000000000\00000000000000000000000000000000\extdata\00000000\-targetgameid-\user
This time, you move the last two zeros into the front, making 000edf00, 00000edf.
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https://www.youtube.com/watch?v=-CCoWlfSVvw