rocket.chat api: how do i send a video to a group/channel properly?

[osaid500]

When i try to view it in a web browser, it doesn't let me download the video even though i can do that in the app. But it doesn't treat it normally like when you send a video manually. It lets you keep downloading the video(saves to the gallery) and won't show the preview after doing so. Can somebody please explain what's wrong with my code?

const sentMsg = await driver.sendMessage({
msg: msg.caption,
rid: ROOMID,
attachments: [
{
video_url: videoUrl,
title: "videotest.mp4",
},
],
});