Konnichiwa philupthetank86-san!
Usually, "-kara" means the starting point of time and space.
"ima kara video o miru" means the starting point of time and is "I watch a video from now(or just now?)".
"Watashi ha Nihon kara Kita" means the starting point of space and is "I came from Japan".
But sometimes "-kara" has other meaning, "standard of value", "cause", "reason" and "material".
NANGI