And as I said, each one has to be evaluated individually. The moment you say “groups like…” you are asking too broad a question.
Also, you say “seem to be Trinitarians.” Yes. Exactly. Some are true Trinitarians. Some are not.
Sometimes each act of baptism must be evaluated individually because some of them readily re-baptise. If someone has a video of a baptism, that doesn’t prove that it was the first baptism. It might be the 5th or 6th time for the same person.
There is no one-answer-fits-all here.