This video shows how to get all of the cages in Bongo Hills in Rayman PS1 during your first visit. 1 of the cages can't be obtained until you've gotten the helicopter power.
Honestly! The frame rate in THIS port of Rayman 1 looks really very nice and smooth! 😃😃😃😃😃😃 I’m guessing it’s 60 frames per second and the iOS’s frame rate tends to be rather jittery at times.
You'll need some kind of capture device. There are special game capture cards, but they're pretty expensive. Other options would be some cheap composite capturing device (assuming you're using composite cables). Some video cameras have built in recording options which are mainly meant for recording TV programs, but they work with old consoles as well.