His numbers are wrong (and he admits as much), but they're really just illustrative anyway. The entire point he's making is that if you're growing quickly, dilution isn't a big deal.
And the VC equity split usually changes by round and market conditions: A is usually 30-35%, B is usually 15-20%, C+ are usually <=10% (this is for a typical startup; Cloudera is a unicorn so the rules are out the window). The general rule of thumb is that founders drop below 50% sometime around the C round. Most VCs are hesitant to dilute founder equity too early because it can hurt recruiting and make it harder to fund later rounds.
And the VC equity split usually changes by round and market conditions: A is usually 30-35%, B is usually 15-20%, C+ are usually <=10% (this is for a typical startup; Cloudera is a unicorn so the rules are out the window). The general rule of thumb is that founders drop below 50% sometime around the C round. Most VCs are hesitant to dilute founder equity too early because it can hurt recruiting and make it harder to fund later rounds.