On the first glance, this is a modestly interesting bimetric theory of gravity, one of the many. These theories are usually considered valid science, not without issues, but at least offering some new insights. See https://en.wikipedia.org/wiki/Bimetric_gravity.
On the other hand, this particular theory comes from this person: https://en.wikipedia.org/wiki/Jean-Pierre_Petit. Even if it would have been a blinding light of scientific truth (and it isn’t), he would have a hard time convincing other scientists in its validity, because of his... other convictions.
On the first glance, this is a modestly interesting bimetric theory of gravity, one of the many. These theories are usually considered valid science, not without issues, but at least offering some new insights. See https://en.wikipedia.org/wiki/Bimetric_gravity.
On the other hand, this particular theory comes from this person: https://en.wikipedia.org/wiki/Jean-Pierre_Petit. Even if it would have been a blinding light of scientific truth (and it isn’t), he would have a hard time convincing other scientists in its validity, because of his... other convictions.