Yes, you can remove stickers from videos. There are a few ways to do this, depending on the video editing software you're using.
If you're using iMovie, you can select the sticker in the preview window and press the delete key on your keyboard. This will remove the sticker from the video.
In Final Cut Pro, you can select the sticker in the timeline and press delete. This will also remove the sticker from the video.
If you're using Adobe Premiere Pro, you can right-click on the sticker in the timeline and select Remove Effects. This will remove the sticker from the video.