Some useful information I can share here.
SNES games known to use hi-res mode
Note: If the movie was done with Snes9x and you are dumping for encoding, enable Audio/Video Recording -> Simple2X Resize for AVI (for HiRes).
- Seiken Densetsu 3 (aka Trials of Mana)
- Secret of Mana/Seiken Densetsu 2
- RPM Racing
- Ranma 1/2: Chounai Gekitou Hen
- Romancing SaGa 3
- Lufia II: Rise of the Sinistrals (during the end credits)
Possibly more out there?
Below are links to pages that aren't as useful, but should serve as some source of amusement.