Here are links to three YouTube videos on the use of POCUS for determining jugular venous pressure.
JVP (Jugular Venous Pulsation) Evaluation using Ultrasound. Sept. 29, 2014. 2:21:
JVP – Basic Introduction. Oct. 3, 2017. 6:26:
Ultrasound to estimate JVP. Aug. 14, 2019. 1:26