When you show up to drop a video and ask for donations, you're not adding anything to the community, you're leveraging it for selfish gain. Therefore, spam. I'm not going to encourage this behavior by watching or engaging with the video.
Are you talking about the Patreon link? That's in the video's description on youtube, and lemmy automatically shows a preview of the video's description. The video creator or poster did not specifically post their Patreon link here.