The Chiron Frequencies: See (2021)

The Lockdown ended. Ray and Sam take a walk into their local woodland. Ray takes a phone-video of Sam under two large communication towers and begins to seizure, triggered by what seems like the towers above. Sam follows him into ictus, both inexplicably dying. Dr Chiron and DCI Radin piece together Ray and Sam's undetermined demise, viewing their last moments together through final phone footage.