Open your file manager and navigate to Internal Storage > Android > media > com.whatsapp > WhatsApp > Media > WhatsApp Video .
WhatsApp videos are usually saved directly to your Photos app if "Save to Camera Roll" is enabled. Otherwise, look within the WhatsApp chat from October 19, 2021. VID-20211019-WA0034mp4
Since the filename is generic, you can verify the content by: Open your file manager and navigate to Internal
However, if you are looking to manage, edit, or share this specific video, 1. Locate the File 2021. Since the filename is generic