Joey's podcast with former cheat/mechanic telling all about spotting cheats and how to protect your games:
https://www.youtube.com/watch?v=ORp2OAHRiTM. Watch starting at 1hr 28min for shenanigans and advice.
Key take-aways: dealer must keep hands off deck while not dealing and do full shuffle procedure consistently each time (better with face-down wash, if possible), and better integrity with auto-shuffer.
Beware of dealer holding hand(s) like this - often a sign dealer is palming cards:
Guest said you should assume any private game of big enough stakes is "mobbed up" or rigged.