The 6th amendment provides the right "to be confronted with the witnesses". The wording clearly implies a face-to-face meeting. The problem with video testimony

The 6th amendment provides the right "to be confronted with the witnesses". The wording clearly implies a face-to-face meeting. The problem with video testimony is that the jury's ability to observe a witness's demeanor is severely limited. And even with two-way video, the witness wouldn't really be testifying in the accused's presence as he/she could see mainly just the questioner.