Chromecast receiver v3 fake mediaElement for youtube

    const context = cast.framework.CastReceiverContext.getInstance();
    const playerManager = context.getPlayerManager();

    var yt_events = {};
    var pause_request = false;
    var yt_player;

    var yt_video_fake = {
        removeAttribute: function(attr) {
        },
        setAttribute: function(attr, val) {
        },

        getCurrentTimeSec: function() { return yt_player && yt_player.getCurrentTime ? yt_player.getCurrentTime() : 0; },
        getDurationSec: function() { return yt_player ? yt_player.getDuration() : 0; },
        getVolume: function() {
            if(!yt_player || !yt_player.getVolume) {
                return 0;
            }

            var volume = new cast.framework.messages.Volume();

            volume.level = yt_player.getVolume() / 100;
            volume.muted = yt_player.isMuted() ? true : false;

            return volume;
        },
        setVolume: function(vol) { yt_player && yt_player.setVolume(vol.level * 100); },
        getState: function() {
            if(!yt_player || !yt_player.getPlayerState) {
                return 'IDLE';
            }

            var state = yt_player.getPlayerState();
            var _state;

            if(pause_request) {
                pause_request = false;
                state = YT.PlayerState.PAUSED;
            }

            switch(state) {
                default: case YT.PlayerState.UNSTARTED:
                    _state = 'IDLE';
                break;

                case YT.PlayerState.PLAYING:
                    _state = 'PLAYING';
                break;

                case YT.PlayerState.PAUSED:
                    _state = 'PAUSED';
                break;

                case YT.PlayerState.BUFFERING:
                    _state = 'BUFFERING';
                break;

                case YT.PlayerState.ENDED:
                    _state = 'ENDED';
                break;
            }

            return _state;
        },

        addEventListener: function(e, func) { },
        load: function() {},
        play: function() { yt_player && yt_player.playVideo(); },
        pause: function() { if(yt_player && yt_player.pauseVideo) {pause_request = true; yt_player.pauseVideo(); }},
        seek: function(timeTo) { yt_player && yt_player.seekTo(timeTo, true);},
        reset: function() {
            if(yt_player) {
                try { yt_player.destroy && yt_player.destroy(); } catch(e) {
                    //console.trace(e);
                };
                delete yt_player;
            }
        },

        registerErrorCallback: function(func) { yt_events['error'] = func; },
        registerEndedCallback: function(func) { yt_events['ended'] = func; },
        registerLoadCallback: function(func) { yt_events['load'] = func; },

        unregisterErrorCallback: function () { delete yt_events['error'] },
        unregisterEndedCallback: function () { delete yt_events['ended']},
        unregisterLoadCallback: function () { delete yt_events['load']}
    };

    Object.defineProperty(yt_video_fake, 'currentTime', {
        val1: null,
        get: function() { return yt_player && yt_player.getCurrentTime ? yt_player.getCurrentTime() : this.val1; },
        set: function(newValue) {
            yt_player && yt_player.seekTo(newValue, true);
            this.val1 = newValue;
        },
        enumerable      : true,
        configurable    : true
    });

    Object.defineProperty(yt_video_fake, 'volume', {
        val1: null,
        get: function() { var vol = this.getVolume(); if(vol) return vol['level']; return 1; },
        set: function(newValue) {
            yt_player && yt_player.setVolume && yt_player.setVolume(newValue * 100);
            this.val1 = newValue;
        },
        enumerable      : true,
        configurable    : true
    });


    Object.defineProperty(yt_video_fake, 'duration', {
        val1: null,
        get: function() { return this.getDurationSec(); },
        set: function() {},
        enumerable      : true,
        configurable    : true
    });


    function YoutubePlayMedia(videoid) {
        var yt_container = $('#yt_container');

        if(!yt_container.length) {
            yt_container = $('<div id="yt_container" style="position:absolute;top:0;left:0;width:100%;height:100%;"></div>');
            $('body').append(yt_container);
        }

        yt_container.html('<iframe id="youtube_container" style="width:100%;height:100%;" frameborder="0" allowfullscreen="1" allow="autoplay; encrypted-media" title="YouTube video player" src="//www.youtube.com/embed/' + videoid +'?autoplay=1&enablejsapi=1&modestbranding=1&controls=0&fs=0&iv_load_policy=3&rel=0&cc_load_policy=1&cc_lang_pref=bg"></iframe>');

        yt_player = new YT.Player('youtube_container', {
            events: {
                'onReady': function(e) {
                    yt_player.is_loaded = true;
                    yt_player.playVideo();
                },
                'onStateChange': function(e) {
                    switch(e.data) {
                        case YT.PlayerState.PLAYING:
                            if(yt_player.is_loaded) {
                                if(yt_events['load']) {
                                    yt_events['load']();
                                }
                            }

                        break;

                        case YT.PlayerState.ENDED:
                            //yt_events['ended'] && yt_events['ended'](e);
                        break;
                    }
                },
                'onError': function(e) {
                    //yt_events['error'] && yt_events['error'](e);
                }
            }
        });
    }

    function YoutubeLoadMedia(url) {
        current_media_type = 'Youtube';

        window.onYouTubeIframeAPIReady = function() {
            window.youtube_loaded = true;
            YoutubePlayMedia(url);
        }

        if(!window.youtube_script) {
            window.youtube_script = document.createElement('script');
            window.youtube_script.src = "https://www.youtube.com/iframe_api";
            var firstScriptTag = document.getElementsByTagName('script')[0];
            firstScriptTag.parentNode.insertBefore(window.youtube_script, firstScriptTag);
        } else {
            // Вече имаме api направо действаме
            YoutubePlayMedia(url);
        }
    }


    playerManager.setMessageInterceptor(
        cast.framework.messages.MessageType.LOAD,
        loadRequestData => {
            if (loadRequestData.media && loadRequestData.media.contentId) {
                YoutubeLoadMedia(loadRequestData.media.contentId);
                playerManager.setMediaElement(yt_video_fake);

                return false;
            }

            return loadRequestData;
        }
    );

    const options = new cast.framework.CastReceiverOptions();
    options.disableIdleTimeout = true;

    context.start(options);