The objectives for engineering is to develop higher pixel/sensor density. On the other hand there is the huge amount of data to transfer and to store inside the camera. There are technical limitations for datatransferbandwith. Therefore compression is absolutely necessary. But videocompression is allways a loss of informations (dependant of intelligent algorithms)
Video technology is made for TV and home use. DV- Video has vertical pixels around 0.7 k (720 pixel for PAL) and HDV with 1440 or 1920 pixels.
The sensor has only one sensibility (~filmspeed). The cameras amplifier increases signals from the sensor and the camera can run also in very low light (1 Lux). Unfortunately this increases also free electrons (not light emitted by sensors) which are responsible for visible noise. Also in higher temperatures the sensors and electronics produces visible noise.
The real sensor sharpness is lower for video (also HD) than for film. The software of the camcorder tries to eliminate this lack by “sharpening” edges/corners and lines by filling pixels. This gives a “artificial” sharpness feeling to a lot of viewers. Maybe comparable to music from CD which is not true and seems to be “artificial clear”.
Movements: normal Video pictures are seperated horizontical into lines. Every 25 Hz (1Hz=25000 part of a second) one half of the picture (a line followed by a gap) is recorded and presented. After this the other half (gap followed by a line) is recorded or shown (50i). Due to inertia for humans visibility it seems to be one picture! Only highend HDTV uses 50p
For analogue movie each frame is a complete picture and will be presented in 18 or 24fps. Fast movements results in slightly flickering. Video film seems to be better , more flowing as 24 fps (or 18 fps) Super8 film, .but with less sharpness! (35 mm analogue moviefilm will also run smooth with 48 fps - every picture is twice on the film - actually this is the best technology!)
Another important lack is shock sensitivity for this kind of video cameras which are made with smallest parts from plastics and thin plastic-housings! Materials, electronic layout/components for consumerproducts have MTBF (MeanTime Between Failure) which is very low and sufficient only for time of warranty. Nothing for real outdoor or professional usage and long durability..