Maybe google duo would be an alternative to secure video chat. I would agree on this that we really do not need data to be sent almost always as with any other company that we used to join in ICO. If the purpose of kyc is also to prevent an abuse on account farming and to verify identites of participants, and on the other hand, the concern of participant is the security of their data, it would be best if the verification will go through video chat instead that way, you need not store files and at the same time you get to verify their identities.