Hi Yang Zhang,
Its better to create a code example that reproduces the issue, videos are useful but not so much as a code, because its best to reproduce the problem in order to be able to give you a solution about and additionally there is no link for the video.
Please, do not hesitate to contact us if you have any additional questions.
Best regards,
Yavor Dashev
Smart UI Team
https://www.htmlelements.com/