Stock price when the opinion was issued
He did a put spread on May 2, the 500-520 end of July put spread. He wasn't concerned about NVDA or tech, but to the market's reaction broadly to Nividia's earnings. Rally broadening in the S&P had not happened. You're limiting your downside with a spread. He bought back the 500 put, which leads him long only the 599 outs.
Why would both go on on the same day? The VIX (VXX-N) tracks the expectation of volatility over the next month. Volatility changes. If the market (SPY-N) is going up then typically volatility comes down. If the catalyst for a rally is thought to be short lived, then volatility can go up as well.