Justice Antonin Scalia, an associate justice of the Supreme Court nominated by President Reagan, who died on February 13, made over 176 video appearances on the C-SPAN networks during his 29 years on the bench. They can all be searched and using the filters on the left side of the search page, one can drill down into the type of event of interest to you.
Included are his original confirmation hearing in 1986
There are ten speeches where he talks about judicial topics. You can also find 15 forums, some with other justices, where a range of topics are discussed as well as six interviews. He also took part in two moot court cases.
There are 115 oral arguments where Justice Scalia can be heard asking questions.
There are more interesting appearances of Justice Scalia at informal and formal events. He has appeared before congressional committees and ceremonies. The event type dropdown on the search results page allows you to zero in on types of events you might want to review.