The steps are as follows:
1) Log in to the official WeChat account.
2) Select Material Management and click New Graphic Message.
3) Click the "Video" button on the toolbar where the video needs to be inserted, click the "Video URL" in the pop-up interface, paste the Tencent video link address of the promo in the "Video URL" input box, click OK to insert, edit the content and save it.
4) Select the mass message, select the graphic message to be mass-sent, and scan the QR code through WeChat to confirm sending the article.