Jul 05 2016 | 8:01 am EDT
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Yes there is a difference. SD (Standard Definition) videos will be a 4:3 ratio. HD videos are a Wide Screen format of a 16:9 ratio. When a feature film is converted for viewing in 4:3 for devices such as old NTSC television sets and SD video which are 4:3 screen ratio, the film can be formatted in many different ways to fit the smaller screen ratio of 4:3. There is no set standard for down converting. HD or Wide Screen helps to preserve the aspect ratio of the original film or HD broadcast, so you see what was originally intended.
Originally Posted by iMore Question
Digital HD videos can take more space on hard drives or digital storage because they are of higher definition than SD videos. SD movies and videos can also be less expensive to rent or buy on the iTunes Store. Some people still have older iPods and TV sets that can only play SD video, too.