Vay: Opening Movie sequence + a little gameplay.
How about this obscure classic? I know it doesn't look like much now, but when the Sega CD came out, many of the games just astounded us. The sound quality, the almost arcade style graphics, and a lot of great titles to boot! Not to mention it had actual voice portions, unheard of in 92, the system was really ahead of the competition. This particular game, was interesting in the fact it was a strange blend of Gundam Wing meets Phantasy Star in its concept.
The problem with the Sega CD was how it was designed. At least the version I had anyways, the Sega CD itself was a massive almost VCR looking CD player. For it to work you had to slide your existing Sega Genesis on top of this metal connector that rested on top of the Sega CD, a lot of issues arose from that.
Then there was the power supply, the Sega CD used more power then the old Sega Genesis *from what I remember anyways* so the original AC adapter was not capable of running it long term. (once again, I may be mistaken on that last part, its just how I remember it, was a long time ago.)