There are Aztechs with a Samsung MIDI synth on them (some cards have it rebranded to Aztech too) and some with ICS WaveFront MIDI synth. (I cannot see the video since I am at school right now)

Going by the looks of the card it's a Aztech Waverider Pro 32-3D PnP variant, with a Samsung chip as Tiido mentioned.

AZT2320 and a Samsung wavetable? That'll be the MMSN853. Aztech cards were always sold under varying marketing names, but the FCC ID was a reliable identifier.

You can see the Samsung chip and its ROM at the top rear of the card in the video. I have its earlier sibling, the MMSN847, which pairs an earlier version of the Samsung KS0164 with an AZT2316R (non-PnP predecessor of the 2320). It sounds just like in the video: a pretty crude low-end wavetable synth. The good news though is that it is a 100% hardware solution, you just feed the MPU-401 interface of the card MIDI and it does its synth.

Aztech had two older wavetable systems as well, first a very rare (proprietary) expansion board with Ensoniq's OTTO (same as on the Soundscape cards) and later some more common cards and (still proprietary) expansion cards with the ICS WaveFront 2115. That requires a TSR to initialize it, but the sound quality is a lot better - not at Roland/Korg/Yamaha levels, but on par with say Creative's AWE/Emu8k or on OPL4. Added benefit for some corner cases is precisely that it doesn't automatically activate when the card is installed. That means I can use the same MIDI interface for external modules and only initialize the 2115 if I need it.