Length Of TVB Series

have any notice the length of tvb series. i have been watching series from 80s to now. i have notice the length of tvb series goes up and down. in the 80s the length of a series is about 40 minutes. in early 90s its 46 minutes. starting mid 90s it 44 minutes. now its 42. wired how the length goes up and down.

 

if u watch it in the local area, the whole thing takes 1 hr, its 40 sth for us cuz they cut out all the commercials. Maybe that's why xD

omg u watched from the 80s?! u must notice lots of changes all the way down here.

 

i petty much the dvd ones. so it commercials free on all of them. so it the time that i mention. unless i watch the most current one, the commercials makes some part go back a few seconds. so the episodes is like a minute long.

 

I remember that in the early 90's there were 3ep for every tape when you rent it, than it was 2ep.

 

yeah that is 1998. tvb decides to make it 2 episodes instead of 3. atv follows tvb makes it their 4 episodes into 3.

 

thanks

 

Well I guess my assumption is that more time for ads = more profit for the channel which in this case TVB