Optimize ad inventory with contextual video embed

/**
*  Contextual embed script: Perform a search to find a related video on Dailymotion using the API and embed the first video from the result
* 
*  Import the Dailymotion javascript SDK
*  <script src="https://api.dmcdn.net/all.js">
* 
*  Put a div tag with an id equal to "dm-contextual-embed"
*  <div id="dm-contextual-embed"></div>
* 
*  This script doesn't work with IE11, Android 4.4, iOS < 10, and below 
*/
(function() {   
    //ID of the Div tag where to append the player
    const divId = "dm-contextual-embed";
 
    //Minimum length of words to keep in title for the search
    const minWordLength = 3;
 
    //Maximum of words used for the search: more words you keep, less are chances to get a result
    const maxWordSearch = 4;
 
    //Get the title of the page and returns keywords about it
    const findKeywords = function(){
        const title = document.querySelector("h1") !== null ? 
                    document.querySelector("h1").textContent : "";      //find title on the provided tag name
        
        return  title.replace(/[^a-z0-9\-]/gmui, ' ')                   //Keep a to z letters, numbers and "-" from the title
                        .split(' ')
                        .filter(word => word.length >= minWordLength);  //Removes too short words
    }
 
    //API parameters used to perform the search
    const searchParams = {    
        'fields': "id,title",                     //keep only id to embed the video
        'private': 0,       
        'longer_than': 0.35,                      //Find videos with a duration longer than 21 seconds
        'flags': "no_live,exportable,verified",   //Find only embeddable videos and from verified catalog if no owners provided
        'sort': "relevance",
        'limit': 1,
        'search': findKeywords().sort((a, b) => b.length - a.length).slice(0, maxWordSearch).join(' ').substring(0,150) //Sort words by length and keep a stock as defined
    };
 
    //Player parameters used for the instanciation
    let playerParams = {
        'width': "960",
        'height': "540",
        'video': "x70val9", //default video id in case of no result
        'params': {
            'controls': true,
            'autoplay': false,
            'queue-enable': true,
            'queue-autoplay-next': true,
            'ads_params': 'contextual' 
        }
    }
    
    //Call the Dailymotion Platform API and search for results
    DM.api("/videos", searchParams, 
        function(response){
            console.log("%c DM contextual-embed ", "background: #56C7FF; color: #232323", "Search: " + searchParams.search);
            //if there is a result
            if("list" in response && response.list.length > 0){
                playerParams.video = response.list[0].id;
            } 
            else { console.log("%c DM contextual-embed ", "background: #56C7FF; color: #232323", "Cannot find related video. Default video used."); }
            
            //if the specific tag exist we launch the player with the video and display its title
            if(document.getElementById(divId) !== null){
                const elm = document.getElementById(divId);
                const titleTag = elm.appendChild(document.createElement("h3"));
                const playerTag = elm.appendChild(document.createElement("div"));
                
                const dmPlayer = DM.player(playerTag, playerParams);
                titleTag.textContent = response.list[0].title;
            }
            else { console.warn("DM contextual-embed Unable to create a player, did not find a div with id " + divId); }
        }
    );
})();