我给你提供思路，然后你自己去完善。because you should have your own ideas. you can't depend others all the time.
好处：
1，the era now is "vision-era." people are inclined to see the pictures or videos rather than the words. thus , it can make your speech vivid.
2，videos and ads. sometimes can make audience better understand a topic.
3，the short videos can inllustrate many things that words can't explain.so ,it can make your topic clear .
4，improve the efficiency .save a lot of time.
