Asset : Simple movie texture. 360° video in WebGL build plays at reduced speed.

Hi,

I m using the asset Simple MovieTextures for Unity WebGL (Unity Asset Store - The Best Assets for Game Making)
I play a 360° mp4 file in an inverted sphere texture.

The asset is simple to use but when I play my video, while the sound is working fine the video plays too slowly and I have to load it twice for it to display (first time I will have the sound but a black screen).
I reduced the quality of my video which seemed to slightly improve the slowness issue but it is still present.
I would like to not further reduce the quality of the video as it will impact the user experience at this point.

I am looking for a solution to solve this.
From the research I did I found someone suggesting to use AVPro (Unity Asset Store - The Best Assets for Game Making) but it is too pricy for me.
I would like to code my own solution if I can or get a cheap asset that would help.
I am not sure were to start, this is not a topic I am very familiar with as you may have guessed.

Thank you in advance if you could point me in the right direction.

With retrospect posting in the VR forums was a poor choice so I moved my post there Asset : Simple movie texture. 360° video in WebGL build plays at reduced speed. - Unity Engine - Unity Discussions since it is more of a WebGL matter.

Feel free to delete it, I don’t believe I can do it myself.