Open the chat where this video was sent/received and look at the text message immediately preceding or following the video. That caption likely explains what is in the video.
Because this is a specific private file, I cannot view or analyze its contents. However, here are some ways to find the "good text" (content) associated with it: VID-20220731-WA0152mp4
Search your WhatsApp for "VID-20220731" to see if it was part of a specific conversation thread. Open the chat where this video was sent/received