Part One – The basics
#1 Container formats.
.mov .wmv .mp4 .mp4 .avi . mkv, ect
These are not video formats. Think of these as boxes that can contain any combination of video & audio codecs
#2 codec (coder-decoder)
Example – h.264, ProRes, DV, windows media a/v, mpeg 1/2/4, aac, mp3, (hundreds are available)