If a party shows that when served with notice under this subdivision (2) the party was unable through the exercise of diligence to obtain counsel to represent him or her at the taking of the deposition, the deposition may not be used against the party.
An audio-visual deposition may be used for any purpose and under any circumstances in which a stenographic deposition may be used.
The notice for taking an audio-visual deposition and the subpoena for attendance at that deposition must state that the deposition will be recorded by audio-visual means and whether a simultaneous record will be made.
The following procedure must be observed in recording an audio-visual deposition:
Tenn. R. Civ. P. 30.02