Not exactly. We understand the keyword explorer, but with that, you have to have a keyword in mind. So if I am doing a video on "cats", initial thought would be to use "cats" as my keyword. Obviously, the score for that would be very low. So then I have to think up other words or phrases to go along with it, like "Watching Cats chase laser pointers".
This tool would help when first uploading the video to make sure you grabbed all of the really good tags out of your video. It would scan the Closed captioning looking for words and phrases you mentioned, but didn't register in your mind, and would score these words/phrases to help find you the best keywords/tags. Going back to the idea of the cat video, I might be showing off my cat playing with the laser, but I had mentioned that "my cat normally likes to play in boxes". The tool could pick up on the boxes comment and formulate a keyword/tag like "Cats in boxes".
As mentioned before, we have spent hours at times trying to find keywords/phrases that could be used, but in order to get a good enough score, we might end up with something that has nothing to do with the video, and then just can't use it. Even when we plan ahead, sometimes we might only get one or two keywords/phrases that really do us no good. When you have videos that are tutorials or product reviews, as an example, you would have been able to write out a full script that you could already have keywords/phrases embedded in it. But for videos like ours which are of a podcast nature, with free flowing dialogue, it can be much more difficult.
In summary - a tool that will scan the closed captioning of the video you are uploading/working on, analyse the closed captioning and give you potential keyword/phrases that will help the video. A keyword generator that is based off of what you said in the video.
I hope that clears up what I was trying to say.
BTW - we were just introduced to TubeBuddy a couple weeks ago and love what we have been able to do with it so far. Your videos are very informative and have helped us out greatly. Please keep up the great work.