Is this carseat safe for a newborn?

Ok so I watch this youtuber/vlogging family. They just had their 4th baby. She is about 1 week old. They posted this video about her first day out and have her rearfacing but this seems off. It looks way to big and the buckles don’t seem snug on her. She looks uncomfortable.
They disabled the comments after alot of people telling them to get her a different car seat. This isn’t their first time having their kids buckled weird. They have a 2 1/2 year old in no car seat at all and an 8 year old and a 6 year old in no booster or anything. I always thought it was weird but idk maybe im the wrong one just wanted to see everyone’s opinion on this.



They posted these on their instagram today




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