Glad to see someone asking this here.
After testing the new contact shadow feature, my guess would be that epic are not using it for the specific image you posted, first of all the contact shadows feature is riddled with artifacts no matter the settings or the distance, the image you posted has very clean direct shadows.
It may be that they are using high res shadow maps here with large distance cascades. Honestly you are not alone in this camp Unreal detailed shadows on moving objects has been quite a pain to really figure out the past few days.
Here’s what i have so far maybe it will help somehow.
1 - if you use all out moving shadows from your sun, you will need high res maps 2048 + most likely 4096 map size to get detailed shadows on full character’s body close enough for clean nose to face shadows, plus you need to increase the num of dynamic cascades for this to work, maybe to five or six.
2 - if you do the above you will most likely get shadow artifacts all over your scene due to the default bias at 0.5 so you need to increase that to a number like 2.0 until it is acceptable (this is a problem according to the docs so increasing it may be ok for now) but still annoying becuase you may loose detail contact areas, so must be careful.
3 - another problem surfaces, when the camera gets to a certain distance away from the face then the shadows will start fading out especially the little detailed shadows on the face, I am still trying to see what settings would fix this, i’ve tried so many things by now from countless threads discussing the same issue and there is nothing concrete for me on this yet, but i may be close to figuring it out.
4 - if you use stationary shadows on the sun you have an option to click on “inset” so the shadows wont supposedly fade away as you move away from the character (more on this if you read the help tip). But this has another problem that every time it is clicked the shadows go back being low res. this last option is still confusing to me.
I will continue digging into this further, for anyone out there who knows about these features please feel free to correct me or pitch in to leave a tip or two.