Goofs

When filming the first scene in the Pass, Holly states that it was -17 degrees, while records from the rescue team at the time of the incident show that the temperature was at -40, where Fahrenheit and Celsius match.

Although Holly's camera went back in time with her, there was another one containing exactly the same footage inside the hatch. This is the same camera, retrieved by soldiers during the Dyatlov Pass incident in 1959 and brought inside.

At 18 minutes the leads are drinking hits of local 'moonshine' which have been set alight. One of the characters picks up the still burning liquor from above, gripping the rim of the glass without being burned, suggesting the flames are CGI and the contents of the glasses likely not a high proof spirit.