Besides Netflix where can you watch the SNL skit ninja pep talk from Season 19 Episode 19?

I'm not sure what you mean by "Ninja Pep Talk" here, but "Pep Talk" is the 19th episode of the 18th season of the American sketch comedy series Saturday Night Live, which aired on March 13, 1993. It is not available on Netflix, but you can find it on Peacock, Paramount+, and Saturday Night Live's official website.