Video file formats

The most useful file formats are:

• .mov - quicktime player
• .mp4 
• .avi
• .mpg (.mpeg)
• .m4v
• .m2t
• .wmv

Some of the formats can be compress and uncompress. Compress fle formats take up less space on the computer and can be transfer to the another computer more faster.  Examples of video compression formats include MPEG-2 Part 2, MPEG-4 Part 2, H.264 (MPEG-4 Part 10), Theora, Dirac, RealVideo RV40, VP8, and HEVC.

Lossless and lossy

Lossless data compression is a class of data compression algorithms that allows the original data to be perfectly reconstructed from the compressed data.

 Commonly used lossless video compression methods include:

• QuickTime
• FFmpeg
• FFmpeg (decoder only, uses x264 for encoding)
• libopenjpeg

In information technology, "lossy" compression is a data encoding method that compresses data by discarding (losing) some of it.

 Commonly used lossy video compression methods include:

• Motion JPEG
• MPEG-1 Part 2
• MPEG-2 Part 2
• MPEG-4 Part 2 and Part 10 (AVC)
• Ogg Theora (noted for its lack of patent restrictions)
• Dirac
• Sorenson video codec
• VC-1

The display resolution

The display resolution of a digital television, computer monitor or display device is the number of distinct pixels in each dimension that can be displayed. It can be an ambiguous term especially as the displayed resolution is controlled by different factors in cathode ray tube (CRT), Flat panel display which includes Liquid crystal displays, or projection displays using fixed picture-element (pixel) arrays.