Depends on the size and framerate of the video
An old guide I wrote is here
I’m also playing with a Russian Cloud PC which is sorta in the are you mention as detailed revently in the forums here
Basically a video is a lot of single images so at 30 fps is 9,000 images
I’ll run off a test clip tonight and set it going in Russia to give you an idea of the GPU timing but I’ll run a shorter clip for testing.
I’ve got a plan whereby I can use Russian PC as much as I like when the Soviets are all in bed so at least it won’t cost me anything other than time.
You can get an idea of the ball-park length of time simply by timing how long one image takes with / without GPU and mulyiply it by 9000.