My youngest is 10 and watches a lot of videos on youtube that I would describe as harmless drivel. I got a copy of the 90's version of the demon headmaster and he absolutely loved it so I got 5 children and it and the chronicles of narnia and he loved that too. I'm trying to find something new for us to watch together as I loved watching the narnia series on Sunday evening with my mum and dad when I was his age. I've discovered a lot of the old series is on youtube (although some annoyingly have episodes missing) and I've written a short list but looking for some more ideas.
So far I've got:
Out of tune (featuring a very young James Corden!)
The queens nose
Aquila
Get your own back
Fun house
Our parents are aliens
Home farm twins
Any other suggestions?