[WASM] Videos often fail to play

import QtQuick
import QtMultimedia
import QtQuick.Controls.Basic

Window {
    width: 640
    height: 480
    visible: true

    component Player: VideoOutput {
        id: videoOutput
        property var vsource
          Button {
            text: player.playing ? "Stop" : "Play"
            onClicked: {
                if (player.source == '')
                    player.source = "video.mp4"

                if (player.playing)
                    player.stop()
                else
                    player.play()
            }
        }
        MediaPlayer {
            id: player
            videoOutput: videoOutput
            source: videoOutput.vsource
         }
    }

    Column {
        anchors.fill: parent
        Player {
            width: parent.width
            height: parent.height / 3
            vsource: "http://localhost/video/1080_1.mp4"
         }
        Player {
            width: parent.width
            height: parent.height / 3
            vsource: "http://localhost/video/1080_2.mp4"
         }
        Player {
            width: parent.width
            height: parent.height / 3
            vsource: "http://localhost/video/1080.mp4"
         }
    }
}