[html]<style>[style*="--aspect-ratio"] > :first-child {
width: 100%;
}
[style*="--aspect-ratio"] > img {
height: auto;
}
@supports (--custom:property) {
[style*="--aspect-ratio"] {
position: relative;
}
[style*="--aspect-ratio"]::before {
content: "";
display: block;
padding-bottom: calc(100% / (var(--aspect-ratio)));
}
[style*="--aspect-ratio"] > :first-child {
position: absolute;
top: 0;
left: 0;
height: 100%;
}
}</style><center><div style="--aspect-ratio: 16/9;"><iframe src="https://drive.google.com/file/d/1cdgO5s1LjIrn1dlI64JnARFpolDN2WkI/preview" width="640" height="480"></iframe></div></center><br>
<center><iframe src="https://drive.google.com/file/d/1sKyJI1_Vp3FqLUvBQSdGsTdJ1K0D8Gby/preview" width="450" height="80"></iframe></center>[/html]
