Publishing by search: what about video in HTML field?

I think the title it's someway self-explaing: we know that when you add a video to a HTML field, SharePoint doesn't use HTML5 video tag, but it installs a web part which show the video itself using a player.
A video, in SharePoint, it's not simply a file, but a folder which contains that video file, maybe its renditions and other stuff i'm not interested in.
Video and assets generally are in a Asset Site which could be accessed from catalog, public site and many others.

If we want to simply use HTML5 video tag, we first need to find the correct video file, then we have to create a reusable content with these features:

• User can select the video using the OOB AssetPicker
• Reusable content automatically finds the video file
• Reusable content automatically generates HTML5 video tag

So, let's first declare a reusable content for video with this HTML code

Why in the world i'm using an img tag?
Because i want the user to have a placeholder like this

Then include a JS (in master page or page layout: up to you) which:

1. Binds a click event to every asset_video class object 
2. On click opens OOB Asset Picker and let user choose an asset
3. On Asset Picker close event, finds the video URL using REST
4. Writes the HTML5 tag using the URL

 Below some code you can use

jQuery(document).ready(function () {
    initAddVideoTemplate();
    SP.SOD.executeOrDelayUntilScriptLoaded(function () {
        SP.SOD.executeOrDelayUntilScriptLoaded(function () {
            var ctx = SP.ClientContext.get_current();
            var site = ctx.get_site();
            ctx.load(site);
        }, "cui.js");
    }, "sp.js");
});

// Adds a listener on every HTML element with class "asset_video"
// You can add your own classes in this obj array, lister for all elements will be created
// The listener will make asset picker to be opened when you click on a asset_video
function initAddVideoTemplate() {
    var count = 0;
    var obj = { 'asset_video': '' }
    jQuery.each(obj, function (index, value) {
        jQuery('body').on('click', 'img[class="' + index + '"]', function () {
            var className = this.className;
            var idOldVideo = "reusableContentInsertVideo-" + rc_generateUUID();
            this.setAttribute('id', idOldVideo);
            if (!count) {
                jQuery.getScript('/_layouts/15/AssetPickers.js', function () { insertVideo(idOldVideo, className, value); });
                count += 1;
            } else insertVideo(idOldVideo, className, value);
        });
    });
};

// Asset picker configuration
function insertVideo(idOldVideo, className, value) {
    var assetPicker = new AssetPickerConfig("");
    assetPicker.ClientID = "";
    assetPicker.DefaultAssetLocation = "";
    assetPicker.DefaultAssetImageLocation = "";
    assetPicker.CurrentWebBaseUrl = "";
    assetPicker.AllowExternalUrls = "";
    assetPicker.ManageHyperlink = false;
    assetPicker.AssetUrlClientID = idOldVideo;
    assetPicker.AssetType = "Media";
    assetPicker.ReturnItemFields = 'Title,Name,Label,SourceUrl,FileRef';
    assetPicker.ReturnCallback = function () {
  
  // Self explaining variable names
        var video_AbsoluteUrl = arguments[0];
        var video_FolderName = arguments[1];

        var pathArray = video_AbsoluteUrl.split('/');

        var assetSite_Url;
        var assetList_DocLib;

        if (pathArray.length >= 5) {
            assetSite_Url = pathArray[0] + "//" + pathArray[2];
            assetList_DocLib = pathArray[3];

   // Helps you to rebuild the folder relative URL
            for (i = 4; i < pathArray.length - 1; i++) {
                assetList_DocLib = assetList_DocLib + "/" + pathArray[i];
            }

            // Finds the HTML img tag to substitute
            var idCalled = jQuery(this).attr('AssetUrlClientID');

            if (undefined !== arguments &&
    arguments.length > 3 &&
    assetSite_Url !== undefined &&
    assetList_DocLib !== undefined) {

    // REST url generation
    // Using URL and folder, you can request the first file of the video folder, which is the default video rendition
                restUrl = assetSite_Url + "/_api/Web/GetFolderByServerRelativeUrl('/" + assetList_DocLib + "/" + video_FolderName + "')/Files?$select=ServerRelativeUrl,Name&top=1";

                jQuery.ajax({
                    url: restUrl,
                    type: "GET",
                    crossDomain: true,
                    dataType: "json",
                    headers: { "Accept": "application/json; odata=verbose" },
                    success: function (data) {
                        // If success, generate che HTML
                        var response = data.d.results;
                        if (response.length > 0) {
                            var videoUrl = assetSite_Url + response[0].ServerRelativeUrl;
                            var fileName = response[0].Name;
                            var extension = fileName.split('.').pop();

                            if (jQuery("#" + idCalled).length > 0)
                                jQuery("#" + idCalled).first().replaceWith("");
                        }
                    },
                    error: function (data) {
                        alert('Error');
                    }
                });
            }
        }
        else {
            alert("Error");
        }
    };

    var imageAsset = new LinkAsset("");
    imageAsset.LaunchModalAssetPicker(assetPicker);
};

// Generate a ID 
function rc_generateUUID() {
    var d = new Date().getTime();
    var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
        var r = (d + Math.random() * 16) % 16 | 0;
        d = Math.floor(d / 16);
        return (c == 'x' ? r : (r & 0x7 | 0x8)).toString(16);
    });
    return uuid;
};