A video showing volcanic eruption is viral on social media. Users claim that Mount Semeru erupted on the night of November 30, 2020. This video was also shared in Indonesian language
Though it is true that Mount Semeru has erupted on December 1, 2020, the video does not show it. Located in Indonesia's East Java province, Mount Semeru erupted on December 1, 2020, forcing hundreds of people to leave their homes. Hot ash tumbled as far as 3,000 meters (9,800 feet) down the slopes of Mount Semeru triggering panic among villagers. But the viral visuals are NOT from Mount Semeru.
When the keyframes extracted from the video are used to perform a reverse image search in Google, we found that this video clip is more than 6 years old and the volcano is seen is the Sinabung volcano from Indonesia.
Here is the longer version of this video.
When Searched using the keywords 'Pyroclastic flow Sinaburg volcano', we found other videos showing similar visuals. This volcano eruption occurred in January 2014.
Therefore, the viral video does not show the volcanic eruption of Mount Semeru. Volonca eruption in the video is from 2014 Mount Sinaburg.