Your 'hunter' has found themselves a part of a supernatural investigation show (similar to Ghost Hunters, Ghost Files, Buzzfeed Unsolved etc) dubbed "Mystery Files". They are a part of the production team of the indie production that releases content on YouTube and has a niche following of fans.
Most of the "mysteries" investigated are spoofs and hoaxes that are hyped up for views, but a close encounter with a supernatural threat leaves even the strongest sceptics in the team questioning themselves.