I really need one tool for my work that can convert audio or video to text and vice versa. Once I came across a resource where you can do this, but I didn't take it. Do you know of any?

I understand that you need to transcribe audio/video to text? Then the Any to Text programme will help you do this https://any2text.com/. I use it a lot in my work now, it speeds up various tasks that used to take me a lot of time, and there were inaccuracies that I had to correct again. Now everything has changed.