You did an amazing job today~ Your grammar is on point, and you also shared examples of your answer and opinion. You also did a great job with the use of vocabulary but there is just some vocabulary that we need to upgrade.  Below are the examples. Overall, Keep up the great Job~!

You said: show off the product. or exaggerate

Better: exaggerate or overemphasize

You said: assembled many sports videos.

Better: compiled many sports videos.

You said: Commercial by Youtube is spread a lot but sometimes they are fraud or fake.

Correct: Commercial on Youtube is spreading a lot .....

You said: They targeting why it's fake..

Correct: They target why it's fake... or They're giving a thorough review of why it's fake... or They are targeting...

You said: They say they buy it by themselves.

Correct: They say they bought it themselves.