Need help setting up my HT system

[Rolling Dice]

I've been watching movies without my AVR and speakers until now (lack of free time), but I finally have time this weekend to set up my sound system. I'm not sure I'm doing it right, though. I have zero experience when it comes to HT audio systems so I'm sorry for the dumb questions.

Here's my equipment:
-TV: LG OLED 65 C1
-Player: Panasonic DP-UB820
-AVR: Denon AVR-X1700H
-Speakers: 5.1 system (LCR+SL&SR+SW)

My TV has a 2.1 HDMI eARC port, so does my AVR (HDMI out). My player has 2 HDMI ports: AUDIO OUT and VIDEO OUT (VIDEO/AUDIO).

My understanding is that I need 2 HDMI cables: 1 from my player to my AVR (HDMI in), and 1 from my AVR (HDMI out eARC) to my TV (HDMI in eARC). I'm still not sure which HDMI port I need to use for my player, AUDIO OUT or VIDEO OUT (VIDEO/AUDIO)? I don't understand the difference.

Also, since my TV doesn't support any DTS format (no DTS passthrough), which is obviously a problem as many discs only have DTS audio, can I bypass that via eARC with my AVR? If so, do I need to do something in the AVR, TV or player settings?

Thanks in advance for your help!