Travel influencer Anunay Sood died from a fatal mix and alcohol … TMZ has learned.

The social media star’s official cause of death is “combined fentanyl and ethanol toxicity” … according to authorities in Clark County, Nevada, where he died.

We’re told the manner of death is accidental.

As you may recall … the Dubai-based content creator was in Las Vegas on an all-expenses-paid trip last month when he died.

Anunay was famous for his travel videos — he had 1.4 million followers on Instagram — and he also ran a marketing agency, Groundwork Solutions, and collaborated with tourism boards around the world.

New video shows the fatal car crash that killed “Call of Duty” video game creator Vincent Zampella … and it looks like speed was definitely a factor.

In the footage, obtained by TMZ, you see a red Ferrari come zooming out of a tunnel on the Angeles Crest Highway in Altadena, CA … the sports car skids and crashes into the concrete barriers between the edge of the road and the San Gabriel Mountains.

Within a matter of seconds, a fireball erupts among the mangled car wreck … and folks rush over and pull a body from the wreckage.

Look at the pavement … there are tire and skid marks all over the road … it’s known to be a stretch of highway where people do all sorts of driving stunts.

“Stranger Things” is coming to an end, and creator Matt Duffer is feeling the heat … saying he’s absolutely feeling some extra pressure to deliver a finale fans can embrace.

We got the “Stranger Things” writer and director at LAX, and our photog asked him how he’s feeling leading up to next week’s big finale.

Matt, who created the series with his brother Ross, says endings are important on beloved shows like his Netflix hit … and he feels good about the final product, which will be in theaters on New Year’s Eve.