1export function prepareVideoFirstFrame(
2 video: Pick<
3 HTMLVideoElement,
4 "autoplay" | "currentTime" | "duration" | "paused" | "played" | "seeking" | "src"
5 >,
6): void {
7 if (
8 video.autoplay ||
9 !video.paused ||
10 video.seeking ||
11 video.currentTime !== 0 ||
12 video.played.length > 0 ||
13 !Number.isFinite(video.duration) ||
14 video.duration <= 0
15 ) {
16 return;
17 }
18
19 const fragment = video.src.split("#", 2)[1];
20 if (fragment && new URLSearchParams(fragment).has("t")) return;
21
22 try {
23 video.currentTime = Math.min(0.1, video.duration / 2);
24 } catch {
25 // A rejected preview seek must leave the native Play control usable.
26 }
27}