Additionally, open Settings > Privacy > Photos and enable WhatsApp if you still can't download WhatsApp videos to Photos app.
If it fails to save WhatsApp videos to Camera Roll, please open WhatsApp > Settings > Chats and turn on 'Save to Camera Roll' option.Either way, you can get videos received from WhatsApp in Camera Roll. Also, you can manage WhatsApp preferences to disable auto-download while manually saving needed videos. WhatsApp features automatically downloading incoming media to Photos app on iPhone via a network connection, photos over cellular/Wi-Fi and videos/audios only on Wi-Fi. Where Are WhatsApp Videos Stored on iPhone?
