I have had glitches during playback of video with few frames occassionally having artifacts just popping up on a clip for a frame or two. I checked the footage on camera via sd card and it is fine. I use USB. 3.0 to import. In the past is used USB 2.0 with no issues . In addition, when I edit on adobe premiere cc these glitches are there and export out with the footage . Cameras I shoot on are the canon c100 and canon 6d. Please help.