Mid range MF zoom for video

Not sure what you mean by digital lens...do you mean auto focus lenses or lenses designed with coatings specifically to work better (supposedly) with digital sensors?

However, whatever you mean, I use two quality manual lens for video work. The Minolta MD 35mm - 70 mm f3.5 and the Minolta MD 50mm -135mm f3.5. Both good quality, well built lenses, with a smooth zoom action. The long lens is push, pull for zoom as well, making zooming very smooth. The standard zoom focuses very closely indeed .
Not as fast as the primes, but sharp enough for FHD fully open and pretty good for still images , but best stopped down a stop. Use with some nice fast primes (the Minolta 50mm f1.4 are great lenses) makes a good set up. And can be brought on e bay for very little money.

 

MF is best for film making, always has been. AF on moving images can be a big distraction. Obviously with small DoF you need to plan the shots well as refocusing on moving images is an art form in itself and although the finders and scenes on m 4:3 are great for still focusing they are difficult to view for refocusing during a shot. However the same problem occurs what ever system you use. Contast focusing is just not fast enough for AF to be the main way of focusing video, although it is improving, MF will always have a major place.

Zooming is best done with motors if available, however small digi cams are rubbish at this and manual zooming can be just as sooth as even top end camera with practise.
IS on camera bodies is useless for serious video work (at present, I am sure it will improve, but lens based IS is superior at the moment). You need a tripod and for moving shots a steady cam. Lens based IS on Canon dSLR's can work well for some types of video (and is great for wildlife stuff as it is with still photography). I have no experience of lens based IS on my Lumix as the only native lens I have is the 20mm f 1.7 which doesn't have it.

The tiny sensors, giving apparent massive DoF on P&S digi cams cover a multitude of sins in comparison to the larger sensors on m 4:3 on dSLR's. You need to approach shooting on these cameras seriously, every camera movement will show and out of focus stuff will also show. You have to learn to operate the cameras manually to get the best from them.

I use Zooms only when I intend to zoom....otherwise I use primes.

 

Olympus 35-70

The Olympus 35-70/3.5-4.5 is nice. It's got a great close focus and is quite sharp.