Maybe don't watch it if you want to be completely ignorant. It does give us a very brief synopsis of the story and includes a few brief easter eggs at the end which were also in the last video iirc.
They give you sort of an intro after clarifying that they changed the main story. So everything you knew up to now no longer applies and even some background characters will not be in 1.0.
So I'd say it's actually good to watch. Or you take my info and be surprised in 1.0 knowing your previous info is outdated. So don't be dissapointed about that then.
I'll give a summary of all non spoiler stuff in the video that I remember:
The entire story from ea is being retconned including: all characters apart from ada and the pioneer, the information we have been told about fiscit and why we are on the planet and other stuff as well
All ada lines are being redone
Mercer Spheres and Sommersloops are being given a purpose
And probably more that I have forgotten.
All the story stuff in the video is just world building and would probably be revealed to you in the first few minutes of gameplay, so I would watch the video anyway to get things that I forgot and to understand the basic story like why the pioneer is there and what fiscit's apparent goals are.
I'd say it has one spoiler about the background of why you're there in the first place, but nothing that wouldn't be revealed in the first 60 seconds of the game from the sounds of it.
It is my opinion that the videos released on Coffee Stain Studios' youtube channel do not contain spoilers by definition. Those videos are their marketing material designed to be seen by people who have not purchased the game yet, so they don't contain any information that they don't want the player base to have yet. There are some glimpses of new content similar to the toilet flush video, and the very, very end of the video is...mysterious.
edit to add: this game made me unironically say the phrase "toilet flush video" and it's very funny to me that they managed to engineer that.
Sure. I didn't even click the video or view the thumbnail because I wasn't sure if this was a 3rd party channel or the official one either, because I'm being careful about spoilers.
The spoilers are pretty light, if at all. If you want to go in completely ignorant, id say to just skip it. There also isn't a ton of content there that you will miss if you do skip it.