"An employee who was infected in the field by taking samples falls under one of the probable hypotheses. This is where the virus jumps directly from a bat to a human. In that case, it would then be a laboratory worker instead of a random villager or other person who has regular contact with bats. So it is actually in the likely category."
What is likely is that the virus jumped from bats to humans 'in the field', i.e. in nature. This is what happened with SARS and MERS to the best of our knowledge.
Considering that China has made a lot of efforts since SARS to trace SARS itself and other potential virii from bats in the wild, this is indeed a possibility that the human who caught the virus first from a bat might have been a researcher. But the 'likely category' is the set of all people who had contacts with bats in the wild and I don't interpret his comment as suggesting that a researcher is more likely than a villager or someone else.