VideoPlayerInput.cs

using UnityEngine;
using UnityEngine.Video;

public class VideoPlayerInput : MonoBehaviour
{
	private VideoPlayer videoPlayer;

	private void Awake()
	{
		videoPlayer = GetComponent<VideoPlayer>();
		videoPlayer.Prepare();
	}

	private void Update()
	{
		if (Input.GetKeyDown(KeyCode.Space))
		{
			TogglePlay();
		}
	}

	private void TogglePlay()
	{
		if (!videoPlayer.isPlaying)
			videoPlayer.Play();
		else
			videoPlayer.Pause();
	}
}