2.5.2.1. Video: W vs V | English Pronunciation Lesson - YouTube - https://www.youtube.com/watch?v=7eA6fN2vO4U

2.5.2.2. Video: How to Pronounce the V Sound in English - YouTube - https://www.youtube.com/watch?v=3k7jN4kX4U

2.5.2.3. Article: Minimal Pair /w/ and /v/ | Learn English - https://www.englishclub.com/pronunciation/minimal-pairs-w-v.php

2.5.2.4. Article: English Pronunciation: /w/ vs /v/ - Pronunciation Studio - https://pronunciationstudio.com/w-v/