TV Signal Splitter, How to split TV signals, get multiple TV Aerial Points From One Aerial

This video explains why you should avoid having more than one Aerial on a mast.

[nonamest]

What's the maximum cable length for the second TV if there is 1, I need 8m of splitting, my quality is 85% so I'm hoping it's got enough juice, thanks in advance

[Bubbles-bvqk]

if I only have 1 cable coming from my dish to sky+ box could I use this to create the second cable for recording

[mike-ology]

should have recorded it somewhere other than a main road lol

[andreweasthope]

But splitters reduce the quality of the signal?