It's unfortunate most of your post keyed off my very first sentence, instead of trying to create a constructive definition of "big data". If you think there are only 2 big data companies, Wish and Groupon, and both failed... I disagree. I listed 4 other companies to start a discussion around big data, but instead I got a long list of excuses why real names can't be trusted and have bad intentions. A more constructive conversation would try and find all big data companies and how they turned out.
The video covers Uber, AirBnB, Coinbase, Snowflake, Doordash, Rivian, Lyft, Opendoor, Pintrest, Robinhood, Affirm, Snapchat, Groupon, Pandora, Grubhub, Yelp, Zynga, Wayfair, Chegg, Warby Parker, Sofi, Casper, Blue Apron, Allbirds, Stitch Fix, TrueCar, Lemonaide, Lending Club, Fitbit, Roku, Oscar, GoodRx, and Instacart, plus a lot of bigger companies jumping in on the narrative like Pepsico, WalMart, Goldman Sachs, Boeing, The Gap, JP Morgan, Experian, Statoil, Paypal... and the list goes on. The video notes that the big FAANG companies generally captured the profits from that era and its speculative investment boom.
In each case, the evidence presented are things company representatives said, media the companies produced, or their financial results. So it's less editorializing by an unqualified vlogger, and more "let me bury you with evidence produced by the companies themselves". That evidence is verifiable, if not confirmed by recent memory. The contribution coming from the author is limited to illustrating how the hype of the past looks a lot like the hype of the present.
I think that simple claim, in the context of evidence presented, does not require as many credentials or fame to be persuasive, as opposed to something like "I have an econometric model that predicts inflation" or "I think this particular component manufacturer is technologically years ahead of their competitors" or even "stock XYZ is about to go down/up". For those claims, some analysis is required and the claimant either needs to show their work or persuade us to trust their work. This video is a far simpler connection of ideas, and the work is shown by the gathering of evidence.
Anyway, I thought it was worth watching for the insights we can gain by watching hype being produced in a historical context, as a frame of reference for understanding today's hype. It's not an academic piece and never could be. Yet I don't blame you for trying to place a quality filter on the torrent of information facing us.