Homemade video stroboscopy to visualize vocal cords in action for voice /speech therapy.

I want to be able to visualize in real time feedback the vocal cords through a tiny lense connected to a thin wire that would go through the nose down to see vocal cords in action while talking /singing. I actually bought such kind of lense (invented for plumbers...but the wire is still to thick for me to push it through...Doctors actually have this...it's called video stroboscope...