The Witch Doctors Behaviour in the Video is normal, Witch Doctors (like Succubus) are picky especially when high level.
Once he had a meal in the Tavern his mood improved, but with current dungeon setup he will become unhappy again because he needs to walk far away.

As said they need some time to recover their mood when they were angry.
I am sure these guys in the screen shot went happy again in the next 30-60 secs.

Alright every banned aspect gives now progress once reachable due to unlocks.
To be released next patch.

I did load your save game and did not saw any unintented behaviour.
There was a Juggernaut which were unhappy but he went to the Tavern and got happy again.
I was able to see multiple units becoming unhappy but this always for a reason:
- Necromancer have a very long path to the crypt, when they raise ghouls they need to go so far that they become hungry and sleepy before they get back to a Tavern or their Lair
- Pathways between Work and Lair and Tavern are for some units extremely long which makes them unhappy on a regular basis

So in the save game it is all mainly caused by the layout of the dungeon.

To improve the situation:
- Click on unhappy notifications and see where these units are going
- See that all unhappy units need to go very long paths to rotate between working, eating and sleeping
Either:
- Open shorter parts between these facilities and make sure they are big enough to not require units to wander of far away to find a replacement facility on the other side of the map
- Manually put units in Lairs near to their working place and make sure that a Tavern is not too far away
- In general have Lairs and Taverns in proximity to all working places or your minions will be forced to walk way too far to remain happy.

Mood is supposed to recover over time depending on the patience of a unit type it recovers faster or slower.
However it should normalize within less than a minute when needs are satisfied, but 15 to 30 secs sounds normal.
When they are rallied they wont satisfy their needs until they get angry and then they need some time to recover.
Also problematic is if there are long path ways between the locations a unit normally rotates.
Eg. long distance between Tavern, Lair and Work.