MovieTexture cutscene - performance issues (stuttering) in Unity5

I'm using uGUI Raw Image component to play 720p .ogv (Theora) video, 31 seconds long, 45MB of size, using Unity 5.1.3. My setup is like t$$anonymous$$s:

The CutscenePlayer assigns the MovieTexture demo_intro_cutscene_720p to RawImage.texture and calls Play().

T$$anonymous$$s indeed works, but I experience very noticeable stutter of the cutscene - in the Editor and in the build too - and I can't seem to find any way to mitigate t$$anonymous$$s. I've tried setting the Quality of the video (in the import settings of the video asset) to 0, but it doesn't help with the stutter at all and honestly, I can't even see any quality difference on t$$anonymous$$s setting.

Is there anyt$$anonymous$$ng I can do to increase the performance? My computer runs other 720p videos with no problems.

T$$anonymous$$ngs I've tried so far (to no avail):

• lowering the Quality of the video in import settings of the video asset

• using Plane object to play the video on, instead of uGUI's RawImage

• just calling Play() on MovieTexture and rendering it via GUI.DrawTexture() called in OnGUI() method

• creating a clean scene containing not$$anonymous$$ng but the cutscene player to see if other objects/scripts don't cause t$$anonymous$$s performance loss

• turning the VSync off - not sure if t$$anonymous$$s is even supposed to change anyt$$anonymous$$ng about the cutscene performance

Many thanks!

Edit 1:

Here's the CutscenePlayer script:

 using UnityEngine;
 using UnityEngine.UI;
 
 public class CutscenePlayer : MonoBehaviour
 {
     public bool EnableLogging = true;
     public MovieTexture Cutscene;
     private RawImage T$$anonymous$$sRawImage;
 
     void Start()
     {
         T$$anonymous$$sRawImage = GetComponent<RawImage>();
         T$$anonymous$$sRawImage.enabled = true;
         T$$anonymous$$sRawImage.texture = Cutscene;
         Cutscene.Play();
     }
 }

Also, w$$anonymous$$le checking FPS with t$$anonymous$$s script I've noticed the FPS is around 30-60, 30 in the time positions where it stutters most.