ECHOGEAR Full Motion Articulating TV Wall Mount Bracket for TVs Up to 82" - Smooth Extention, Swivel, & Tilt - Wall Template for Easy Install - Centers & Levels After Mounting Plus Hides Your Cables
https://www.amazon.com/dp/B00VMJEK2C?ref_=cm_sw_r_cp_ud_dp_2AH4EPC1RRDXYDT3ZE1E
I have this one: https://www.amazon.com/dp/B00VMJEK2C/ref=cm_sw_r_cp_apa_fabc_VR9703VKYH4XKBDF3AKY?_encoding=UTF8&psc=1
I had a 65" Vizio LED mounted to it previously, and currently have the P85X mounted to it.
The P85X weighs 100lbs, and it is sturdily attached to it.
Obviously, with an OLED, you'll want to verify mounting screw length, VESA Pattern, and have at least one side of the mount screwed into a stud. I recommend using a professional, licensed, bonded, insured installer, that way, if anything were to happen to the TV or mount, you would have recourse.
Echogear makes good quality TV mounts with easy to understand install instructions( they even include a sense of humor along the way.) These get recommended and used on a lot of TV owners threads on AVS.
I would suggest returning the TV. LeEco is going under so if something happens to the TV you are fucked.
That said, I am a fan of echogear mounts. Super high quality and great support.
ECHOGEAR Full Motion Articulating TV Wall Mount Bracket for most 37-70 inch LED, LCD, OLED and Plasma Flat Screen TVs w/ VESA patterns up to 600 x 400 - 16" Extension - EGLF1-BK https://www.amazon.com/dp/B00VMJEK2C/ref=cm_sw_r_cp_apa_OIcoAb3CYK77X
I have a 70" mount. Is there really any difference in the mounting hardware on a 78"? I'd like to continue using this mount: https://www.amazon.com/gp/product/B00VMJEK2C/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I'm not very familiar with the mounting patterns. It does say it will easily hold more weight than this TV though.
I have this for a 65in vizo P series. Love it, no issues with the TV mounted above fireplace. About half the price
I have the 60" KS8000.
I'm using this: https://www.amazon.com/gp/product/B00VMJEK2C/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1. Meant for 16" spaced studs.
Also make sure, you must get 4x M8 1.25 45mm bolts AND use the spacers that come with the TV (not the ones from the mount box).
"Best" is probably the $400+ Sanus mount. I went with this one and installed it yesterday:https://www.amazon.com/dp/B00VMJEK2C/ref=cm_sw_r_apan_glt_fabc_RSQF5C9XCD737YMSE8N3?_encoding=UTF8&psc=1
For my 77" C1. Liking it so far.
They make a larger one but it is more expensive.