A:AnswerAs long as it is formatted as fat32 it will work for both operating systems. This can be done from the file explorer in windows or disk utility on osx
A:AnswerThe short answer is yes you can. I do this with 95% of my video clips to keep my desktop drive free with space. Is just depends on where your current video files are saved. Could be all inside the iMovie database in you finder >> movies folder or could be on your desktop. Either way you can reconnect the video files if you move them to the external drive.
A:AnswerI have not plugged this in to my samsung TV but i assume that it will work because I have plugged this drive in to my LG 60" TV with no problems.