If you want to have a better jawline, as in a chiseled jawline, you need to understand a few crucial jawline exercises. Is this video about how to mew properly? No. Mewing does not any have scientific basis, especially for adults.
Sources:
5 Exercises for a Defined and Muscular Jawline
https://www.healthline.com/health/fitness-exercise/jawline-exercises
Facial Attractiveness: evolutionary based research
https://royalsocietypublishing.org/doi/full/10.1098/rstb.2010.0404
Effects of Gum Chewing Exercise on Maximum Bite Force
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5893462/
Relative contribution of Jawbone and Cheekbone Prominence
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290027/
Thanks to Tristan Reed (writing), Troy W. Hudson (VO), for helping to create this video!
For Troy: www.youtube.com/TroyWHudson
Music from Bensound.com