Прикріпити

<div style="position:relative;width:100%;height:0;padding-bottom:56.25%;"><iframe src="https://gloria.tv/post/gKRBug8FP4JB2Hbe2nxzYUseB/embed" width="768" height="432" frameborder="0" scrolling="no" allow="accelerometer;autoplay;encrypted-media;gyroscope;picture-in-picture" allowfullscreen style="position:absolute;top:0;right:0;bottom:0;left:0;height:100%;width:100%;"></iframe></div>