Genre: Probably a family movie or adventure.
Country of origin: Unknown, mostly Caucasian actors, Hungarian dubbing.
There is a young girl who is battling with cancer. An extraterrestrial being is paying visits to her sometimes, in the form of a spark, later she takes on the shape of a woman. Maybe the girl believes it to be an angel. When the being comes, it creates a small ball of energy and sends it in the body of the girl, to heal her.
The girl has a supernatural power, she can produce a sphere-shaped energy field which she can use to teleport objects (even herself) to any place on Earth. The being is helping her, because as it tells the girl, once she grows up, she'll be able to transport spaceships to other civilizations.
There are some humans (probably the government) who discover what power the girl has and they try to kidnap her but she escapes, using her teleportation.
Later the father of the girl gets acquainted with the being in it's female form and they start to work together to help the girl.
The questioner has seen it on a VHS tape.