ニコ動の video 要素にローカルソースを読み込んでコメント付きで見るためのスニペット

var v = document.getElementsByTagName("video")[0];
v.style.display = "";
v.style.visibility = "visible";

var h = document.getElementById("CommonHeader");
h.style.backgroundColor="white";
h.innerHTML = "<input type='file' id='mySource'>";

var mySource = document.getElementById("mySource");
mySource.addEventListener("change", function(){
    var mySourceURL = window.URL.createObjectURL(this.files[0]);
    v.src = mySourceURL;
    v.play();
});

v.controls=true;

var payments = document.getElementsByClassName("p_x2 w_[680px] text_textOnLayer.highEmWhite bg_layer.surfaceMediumEmBlack rounded_m");

if(payments.length != 0){
    payments[0].style.visibility = "hidden";
}

// video 要素のマウス操作をブロックしている要素を除去
sc=document.querySelector("div[data-name='supporter-content'");
sc.remove();