Two breaches of F1's strict coronavirus measures have emerged from Austria.
The 20-year-old is then seen holding a cold water bottle to his forehead before being checked again and passing the test.
None were wearing masks.
When asked about the meeting, Red Bull official Marko insisted: "We have a good relationship with Seb so why should we not greet each other nicely?"
The FIA responded by writing a letter to both Ferrari and Red Bull warning that "any individual who does not agree to comply with the COVID-19 code will not be granted access to and may not attend any covered event".