You can now filter over 3 million videos of plays, pitches, etc. by a bunch of parameters, including specific batter/pitcher matchups, result of the play, pitch count of the play, any combination of runner(s) on base, pitch type (including eephus, forkball and screwball!), etc.
https://www.mlb.com/video/search
https://www.mlb.com/video/search