Use APKPure App
Get Image from Video Grabber-7 old version APK for Android
Outil pour saisir et enregistrer une image d'une vidéo sans moins de qualité
Utility for grab and save images from a video without less of quality.
Just select a video file, move to desired frame and save an image. Try again if necessary for another frame.
You can select image format: JPEG, PNG, WEBP.