style.scss

.videoPlayerContainer {
    position: fixed !important;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    background: #000 !important;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
}

.videoPlayerContainer-onTop {
    z-index: 1000;
}

.videoPlayerContainer .libassjs-canvas-parent {
    order: -1;
}

/* Controls are enabled for devices that don't support autoplay. They will be hidden when playback starts.
   In Tizen 2.3 (and probably other old web engines), subtitles are located under '-webkit-media-controls' tree.
   Therefore, we hide controls only if they are enabled.
 */
video[controls]::-webkit-media-controls {
    display: none !important;
}

.htmlvideoplayer {
    margin: 0 !important;
    padding: 0 !important;
    width: 100%;
    height: 100%;
}

.htmlvideoplayer::cue {
    background-color: transparent;
    text-shadow: 0.14em 0.14em 0.14em rgba(0, 0, 0, 1);
    -webkit-font-smoothing: antialiased;
    font-family: inherit;
    line-height: normal; /* Restore value. See -webkit-media-text-track-container 'line-height' */
}

.htmlvideoplayer::-webkit-media-text-track-container {
    font-size: 170% !important; /* Override element inline style */
    line-height: 50%; /* Child element cannot set line height smaller than its parent has. This allow smaller values for children */
}

.htmlvideoplayer::-webkit-media-text-track-display {
    max-width: 70%;
    margin-left: 15%;
}

.videoSubtitles {
    position: fixed;
    bottom: 0;
    text-align: center;
    left: 0;
    right: 0;
    color: #fff;
    font-size: 170%;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    padding-bottom: env(safe-area-inset-bottom);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.videoSubtitlesInner {
    max-width: 70%;
    background-color: rgba(0, 0, 0, 0.8);
}

.videoSecondarySubtitlesInner {
    max-width: 70%;
    background-color: rgba(0, 0, 0, 0.8);
    min-height: 0 !important;
    margin-top: 0.5em !important;
    margin-bottom: 0.5em !important;
}

@keyframes htmlvideoplayer-zoomin {
    from {
        transform: scale3d(0.2, 0.2, 0.2);
        opacity: 0.6;
    }

    to {
        transform: none;
        opacity: initial;
    }
}