Refrigerant Leak hissing sound coming from behind the glovebox?

A/C has stopped blowing cold (fan works fine) accompanied by hissing sound coming from behind the glovebox. If the A/C (compressor) is turned off while the fan is running, the hissing ceases. I think this means a refrigerant leak. I think there is refrigerant piping behind the glovebox near the cabin air filter, as seen in the video linked below. My question is what is the best way to access this area fully? I want to take a look myself before committing to a dye test. Do I have to take the whole dash apart too access the refrigerant system? What parts can I look for/replace in this area?

https://www.youtube.com/watch?v=tD-WPtdRBcg

Thanks!