In late 2022 Brooks analysed the lack of videos showing any practical-looking flights of any eVTOL vehicle, despite multi-billion dollar company valuations.

True: a Brooks publication from late 2022 (including his annual predictions scorecard dated 1 January 2023, which reflects end-of-2022 analysis) contains an analysis of the lack of videos showing practical-looking flights by eVTOL vehicles and contrasts this with multi-billion-dollar company valuations. Mostly true: the analysis exists and matches, but the date is slightly off (e.g. early 2023), or the valuation contrast is only implied. Mixed: Brooks discussed eVTOL hype in that period but did not specifically analyse the absence of flight videos. Mostly false: such an analysis exists but from a clearly different year. False: no such analysis by Brooks exists.

Set before the research began.

1. E1 Where are the crewed eVTOL videos? rodneybrooks.com (Rodney Brooks's blog) · 5 November 2022 Own record

   “I see lots of hype about eVTOLs being on the verge of being big, but I can’t find any videos of prototypes doing what the hype says will be common place by 2025.”

2. E2 Where are the crewed eVTOL videos? rodneybrooks.com (Rodney Brooks's blog) · 5 November 2022 Own record

   “That’s a lot. So shouldn’t there be some videos of them somewhere? My best estimate is that there are actually zero such flights (at the commercial deployment stage) per day at the moment.”

3. E3 Predictions Scorecard, 2023 January 01 rodneybrooks.com (Rodney Brooks's blog) · 1 January 2023 Own record

   “No, not anywhere. There are some uncrewed flights, and there are some just a few tens of meters high over water, but none over populated areas and none at the hundreds of meters that will need to be maintained.”

4. E4 Predictions Scorecard, 2023 January 01 rodneybrooks.com (Rodney Brooks's blog) · 1 January 2023 Own record

   “And the videos on the websites of companies that have taken hundreds of millions of dollars in VC funding show only two meter high crewed hops.”

Brooks's blog post "Where are the crewed eVTOL videos?" is dated 2022-11-05. It says he could find no videos of prototypes doing what the hype predicts, and estimates that there are zero commercial-stage flights per day (E1, E2). His 1 January 2023 scorecard repeats the point: company videos show only two-metre crewed hops, and there are no flights over populated areas (E3, E4). So the late-2022 analysis exists. However, the quoted passages compare the lack of flights with "hundreds of millions of dollars in VC funding," not with multi-billion-dollar valuations, so that part of the claim is only partly supported. The evidence is the published posts themselves.