It's Len Sassaman or Hal Finney. My money is on Finney, but this documentary won't prove anything so who cares.
It was shown awhile back that satoshi submitted code or sent emails while hal was running a marathon.
Intriguingly, as the date for the airing of the documentary has drawn near, a number of high-value wallets from the “Satoshi era” have become active for the first time since 2009. According to Bitcoin Magazine, around 250 bitcoins — worth approximately $15 million at Thursday's bitcoin rate of $60,754 to the dollar — were drained from wallets in the past two weeks. While the coins are not officially linked to wallets used by Satoshi Nakamoto, they have been dormant since the earliest days of Bitcoin, when the cryptocurrency was worth almost nothing. The wallets’ creators would certainly have been Satoshi’s earliest collaborators. https://www.politico.eu/article/mys...documentary-satoshi-nakamoto-crypto-currency/
The wallets might be old but 250 bitcoins is a really small amount for "the satoshi era" when block rewards were 50 bitcoins every 10 minutes. To put it in perspective, during that issuance schedule (pre-first halving) over 10 million bitcoin were minted.