One of the most important abilities any director should have is a talent for dealing with people.
This means first of all assessing what everyone's strong and weak points are.
You will then be able to make best use of the crew, cast and any other helpers you may have at your disposal.
Give them tasks that they can perform well and you will not only get the best results possible -everyone will get a certain amount of satisfaction from the project.
You will also have to learn, if it does not come naturally, how to criticize without being too negative.
If you are too critical, you will only alienate your cast - and since they are probably only volunteers anyway, this is pointless.
So it is usually best to find something in a performance to praise, and allow the actor to build on this, rather than being destructively critical of the parts of a performance you do not like.
The same thing applies to the crew.
You will find that you will have to become something of an expert in every area - sound, lighting, stage management and acting - in order to be able to instruct your cast and crew precisely and to keep an overall eye on standards.
The more you know, the more you will command respect.
But don't impose your own knowledge for its own sake -each member of the team will have their own suggestions to make and you should try to benefit from these rather than dismissing them automatically in favour of your own.
Besides being a master of video techniques, the director must also know how to get the cast to adapt their acting techniques for the camera.