SD (standard definition) is a smaller file, so it will take up less room to store and will download faster. The quality and colours on the screen are fairly good. This will work if you're watching the videos on a laptop (but not projecting it). Our SD videos are about 400 MB on average.

HD (high definition) is a larger file with higher quality images and sharper colours. This format will provide a better viewing experience and sound quality on a large screen or modern TV. Our HD videos are about 800 MB on average.
 
 Note: SD files are required for most iPads.

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