Can Tomb-Sweeping Day send entertainment videos?

First of all, there shouldn't be any law against sending videos in Tomb-Sweeping Day on this day. However, because Tomb-Sweeping Day is a national mourning day, many platforms stipulate that videos cannot be posted.

Tomb-Sweeping Day is the most important sacrificial festival in China, and it is celebrated around April 5th in Gregorian calendar. China people have been polite and respectful to their ancestors since ancient times, so the tradition of the Spring Festival gradually took shape during the Qingming period.