my... little input here.
with regards to video speeding VS time lapse, the effect can be slightly different.
as mentioned by edu, video speeds range from 24 FPS to 30fps. so ur shutter speed is roughly 1/30 of a sec
as for time lapse, each shot can go pretty long, so u get longer blurs, if each shot is exposed for 5 secs. OR IT CAN GO VERY SHORT TOO
For the Long Exposure time lapse vs Video
as for how u "speed up" a video, most video format are still 24fps/30fps. what they really do is take individual frames with a gap of say... 20 frames in between and remove them.
so... consider the following shot within the same time period
X1X2X3X4X5X6
vs a photo
A1..............A2
where each number is 1 shot and the ... in between represents that the frame is still being exposed
in a video format, how it would go at 24FPS
A1 A2 A3 A4 A5
X1 X6 x11 x16
u get the idea
as to how u might differentiate? i could raise some possibilities...
1: movement. if ur exposure is long, moving objects tend to disappear in the photo.
2: blur. if an object is reflective enough, u can see the streaks.
tat is if my understanding is correct.
IE:
if i do a timelapse of 1 min per shot, for a sunset, VS a video and compress, with small amount of ppl strolling by
in the time lapse, i wont see the people appearing, the clouds may look more elongated/blurred. in a compressed video, the people should still appear as figures.
As for when the shutter speed is short/similiar to a video
there will be no visible difference. a photo taken at 1/30 of a sec in 1 sec interval, compared to a video camera where each frame is exposed at 1/30, taken from 1st frame of each 1 sec interval will look the same.
so... consider the following shot within the same time period
X1X2X3X4X5X6
vs a photo
A1________A2
where each number is 1 shot and the shots in both video and photo are exposed the same time.
in a video format, how it would go at 24FPS
A1 A2 A3 A4 A5
X1 X6 x11 x16