createImageBitmap is used to obtain an ImageBitmap from a video element.
Once the promise is resolved, the imageBitmap is uploaded to two webgl textures with two texImage2d calls.
This is slow in iOS Safari on 15.2, see WebKit bug 234920
For a comparison see this example which does texImage2d from the video directly.

Video Resolution: -
Upload: 0 ms, 0 uploads
Render loop: 0 fps


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