Analogue capture problems

[wolfiefish]

I recently captured a video from a Hi8 sony camera, using a device I can't remember the name as it's at work.
Anyway, the overall picture quality is ok, when the people are standing still or moving slowly.
When they wave their arms around I can see lines appearing where their arms are, making it look like they have multiple arms for a second. (The screen or part of the screen where the rapid movement can be seen starts to flicker)

Any ideas why? Is it because it's analogue?

There is also a green bar vertically on the rigt hand side of the screen, it's not wide as to spoil the picture but it can be seen, which makes the picture imperfect.
Any ideas why this is there? Has the camera been damaged in anyway?

Cheers

[Baldrick]

interlaced? seee www.100fps.com for examples.