This could easily become a 5-star review!!!!!
But you have left out some super obvious functions:

1. I want to be able to sort my search results according to chosen column (Time stamp etc.). Now it just sorts on all comments.
2. I want to be able to reply in the results (alt. that you link me to the comment section so that I can post a reply to any filtered comment). Super annoying that I can´t engage in the comments. Might be over 1000 comments and I will not be able to navigate to where to answer.
3. It´s very unuseful that hits are listed in random order instead of chronological (especially transcript hits!). Let chronological order be default for any filtering.
4. Implement a feedback function so that I can send you these comments instead of writing them here! Could be as simple as leaving an e-mail or Twitter contact.

When these four points are done you will be awarded 5 stars!

Oh, btw, the 1st star is because this tool will find hidden (or censored?) comments :-)