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Pros
Pro Recording and editing is possible
Unlike other video players, QuickTime offers recording and editing opportunity. To unlock this features QuickTime Pro 7 is required, which is a fee-based software (29.99$). Program features include possibility to record video and audio directly from microphone, FireWire camcorder and iSight camera. Speaking of video editing, cutting, deleting, resizing, flipping, or rotating a movie is possible.
Pro Easy to use streaming features
QuickTime video player has "Zero-configuration streaming" - video player automatically determines best connection speed. Plus, it can automatically reconnect, if the connection was lost. Step by step video file stream or broadcast guide can be found in the source.
Pro Screen recording is a easy
Pro Elegant look and comfortable interface
QuickTime is developed by Apple, which is known for its plain, but gorgeous and user-friendly design. QuickTime is included in the list of default programs on macOS systems, so it is a good free option for beginners and users who love style and comfort.
Pro Posh smell
Look up Posh and see if you think a software movie player should be POSH. What a hoot.
Cons
Con Video player can interfere with other software
Leaving QuickTime's video player running in background doesn't play well with certain software, especially games and full-screen software.
Con Some common video file formats are not supported
QuickTime does not have native support for some common formats such as DivX, .wmv, and .mkvs.
Con Can't play .srt subtitle files
Con Crashes after OS X update
Sometimes after an OS X update, if the video player wasn’t updated for a long time, QuickTime can crash for no reason