No more need for a Gotek, if you've got an SD card reader, correct?
Assuming you can easily put that SD card in a PC/Mac and read its contents (like I do my Parceiro), yes. That's precisely how I moved the folder of ADFs over you see in the video. But if you do have an external Gotek, you could move ADFs over one at a time, too.
Are you running a stock speed A1000 in that demo?
The creator of the software wrote it on a stock A1000. For me, since I'm using Hippo via multitasking, I decided to enable a mild 14Mhz AdSpeed (sits right on top of the 68000 cpu) before recording this video.
So I enabled AdSpeed, launched Hippo, then launched the DiskImgCtrl where I launched BattleTech. Kind of cool how Hippo kept playing the MOD while BattleTech was loaded and being run. Nice option for text adventures I'd never considered before.
I use AdSpeed sometimes with Hippo because I notice on occasion a song might skip a little - especially if I'm using scopes. The AdSpeed just eliminates that possibility altogether.