How to completely cut the Opera browser buttons from the page?

luxurypluxury

luxurypluxury

There is a video on the page stretched to the full width of the container. When scrolling through the video, it starts to lag because of the opera buttons: "RGX", "Open in window".

I found these buttons in the inspector, but display:none !important; does not hide them:

<div class="button-container">
        <div class="custom-button-wrapper">
                 <div class="custom-button" id="video-detach-button" aria-label="Detach button">
                        <div class="custom-button-contents custom-button-image">
                              <div class="image"></div>
                        </div>
                        <div class="custom-button-contents custom-button-text"></div>
                        </div>
                </div>
                <div class="custom-button-wrapper">
                       <div class="custom-button" id="send-by-qrcode-button" aria-label="Send video to phone"
                                disabled="">
                           <div class="custom-button-contents custom-button-image">
                                    <div class="image"></div>
                           </div>
                           <div class="custom-button-contents custom-button-text"></div>
                            </div>
                        </div>
                        <div class="rgx-button-wrapper" aria-label="RGX Mode Button">
                            <div class="rgx-button-overlay">
                                <div class="rgx-button enabled-button" id="lucid-mode-button">
                                    <div class="image"></div>
                                </div>
                                <div class="rgx-button-text"></div>
                                <div class="rgx-button compare-button" disabled="">
                                    <div class="image"></div>
                                </div>
                            </div>
                        </div>
                    </div>