javascript - HTML5 视频和 Javascript 问题

Question

我正在尝试将下面的代码用于 HTML5 视频。尝试播放一个视频时它工作正常，但当我向页面添加第二个视频时，我似乎无法让它工作。任何有关如何修改 JavaScript 以适应第二个视频的帮助或建议将不胜感激。

window.onload = function() {

    // Video
    var video = document.getElementById("video");

    // Buttons
    var playButton = document.getElementById("play-pause");
    var muteButton = document.getElementById("mute");
    var fullScreenButton = document.getElementById("full-screen");

    // Sliders
    var seekBar = document.getElementById("seek-bar");
    var volumeBar = document.getElementById("volume-bar");


    // Event listener for the play/pause button
    playButton.addEventListener("click", function() {
        if (video.paused == true) {
            // Play the video
            video.play();

            // Update the button text to 'Pause'
            playButton.innerHTML = "Pause";
        } else {
            // Pause the video
            video.pause();

            // Update the button text to 'Play'
            playButton.innerHTML = "Play";
        }
    });


    // Event listener for the mute button
    muteButton.addEventListener("click", function() {
        if (video.muted == false) {
            // Mute the video
            video.muted = true;

            // Update the button text
            muteButton.innerHTML = "Unmute";
        } else {
            // Unmute the video
            video.muted = false;

            // Update the button text
            muteButton.innerHTML = "Mute";
        }
    });


    // Event listener for the full-screen button
    fullScreenButton.addEventListener("click", function() {
        if (video.requestFullscreen) {
            video.requestFullscreen();
        } else if (video.mozRequestFullScreen) {
            video.mozRequestFullScreen(); // Firefox
        } else if (video.webkitRequestFullscreen) {
            video.webkitRequestFullscreen(); // Chrome and Safari
        }
    });


    // Event listener for the seek bar
    seekBar.addEventListener("change", function() {
        // Calculate the new time
        var time = video.duration * (seekBar.value / 100);

        // Update the video time
        video.currentTime = time;
    });


    // Update the seek bar as the video plays
    video.addEventListener("timeupdate", function() {
        // Calculate the slider value
        var value = (100 / video.duration) * video.currentTime;

        // Update the slider value
        seekBar.value = value;
    });

    // Pause the video when the seek handle is being dragged
    seekBar.addEventListener("mousedown", function() {
        video.pause();
    });

    // Play the video when the seek handle is dropped
    seekBar.addEventListener("mouseup", function() {
        video.play();
    });

    // Event listener for the volume bar
    volumeBar.addEventListener("change", function() {
        // Update the video volume
        video.volume = volumeBar.value;
    });
}