The time lapse options on the 750 are:-I've seem time-lapse options which max out at 5 seconds ( DYOR) . . . . how about 5 hours as a sensible upper limit . . . if you are watching seaside tides 5 seconds really is just too short an interval . . . but then I'm often wrong
[1 SECOND]/[10 SECONDS]/[30 SECONDS]/[1 MINUTE]/[2 MINUTES] so at the highest setting 1 second of video equals 50 minutes. So a full cycle would equal approx. 15 seconds at 25fps.
As for self timers. Are they not designed so you can run around and get your picture in the frame?