Check your Photos app under the "WhatsApp" album or search for the date October 5, 2022. Request a Redelivery:
Open WhatsApp and go to the chat where you think the video was sent. Tap the contact or group name at the top. Tap . Download VID 20221005 WA0014 mp4
Look for the video under the tab; if it's there, you can save it to your phone's gallery. Search your Phone’s Storage: Check your Photos app under the "WhatsApp" album
The text is a typical filename for a video shared via WhatsApp (indicated by "WA") on October 5, 2022 ("20221005"). if it's there