Are live dealers actually real people or prerecorded sometimes?

so i was grinding some blackjack last night, switched tables, and noticed the dealer seemed to have the exact same gestures and phrases as one i saw earlier this week. felt a bit off, like the cards and results were legit but the dealer might not have been actually live. has anyone else noticed weirdly repetitive dealer behavior, or even small glitches like hands clipping through chips? i know variance does some wild stuff but it got me thinking about the possibility of pre-recorded loops. maybe it’s just bad camera angles or tired eyes but the vibe wasn’t right. i’ll take normal lag over uncanny repeats any day.