Want to fix the over level audio recording which is on my video recording
This is damaged sound. speak to a specialist to potentially repair it, if it's not *d up beyond recognition. There is no magic button, and i don't think there will ever be. Have a look at restoration software such as iZotope RX if you have the time to fiddle with the controls. I'm not affiliated with iZotope.
If the signal has clipped digitally there's no easy way to expand it and get it back to normal, but you're not very clear with your question. It sounds as if you've either clipped digitally or have a very low signal to noise ration, in which case you could try and use noise reducing software such as Isotope RX plug ins.
Otherwise next time make sure that your recorder's limiter is set on because a squashed signal is better than a broken one.