I'm guessing you only use it once, to run the TDVS to copy the modified save to ironfall.
The youtube app is runing a modified version of the old3ds browser, If you go to settings, email settings, change on google+, download google chrome, and scroll down to the bottom and press the google button you get full access to google.
With that, I assume you will be able to search for something like the gateway go exploit. The only issue is that the youtube app only lets you go onto websites that are succured, with Https://
None of the current exploits are hosted on a secured website. I am guessing smea will have you put the TDVS launcher and the haxed Ironfall save onto your sd card, and serach for a specific site to launch it, then you inject the ironfall save...... and vola.
PS: The youtube app does have a save feature, try deleting it in data managment, it will warn you about loosing the save.
Also, it saves your login info, so there has to be a save of some type.
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YES! Hurry quick.