Don't be lazy.
Best practices is not ausculation with stethescope or post intubation cxr, nor end tidal c02 qualitative or quantitative, or pulse ox nor chest rise. See the passage of the endotracheal tube pass the vocal cords into the trachea.
Only delusions would fool you.
Remember push the endotracheal tube to the left to avoid dislodging the ETT during direct laryngoscopy.
Remember this. Stop being lazy.
Also keeps your D.L. skills up.