To add a video or Reel, click the "Video/Reel" button in the post creation window. After selecting a file:

1. Video category:
   You can choose a category that best describes your clip (e.g. "Humor," "Nature," "History," etc). This helps others find your video.
2. Cover:
   You can upload your own cover image for the video. If not, a cover will be generated automatically.
3. Combine with other content:
   You can mix video with other media — photos, audio, or text — in a single post.
4. Reel block:
   If you want your video to appear in the special Reels block, make sure your post contains only video. In that case, your video will be available both as a separate post and as a Reel. If you add any other media, the video will not appear in Reels.

When done, click "Publish" or "Schedule" if you want to post later.