How to preload video on second scene when using the 1st scene?

Hello, I am new in unity. presently I am learning AR/VR in unity and working on a 360 video project. I have uploaded a 360 video on firebase and use the URL on a sphere video source. The main problem is that it is taking time to load the video from firebase. Can anyone please help me by suggesting some online server name that will load the video without taking the time or is there any way that I can preload the video because the video is in 2nd scene so can I load the video when using the 1st scene? Please help me