Ha ha!
I don't know how to make introductory video. But here is my little try. When I was creating the video, my nephews were laughed on me as they have taken it a funny thing and not seen before such type of job.
Okay. I already posted 10 videos on dtube. But not getting any response. I didn't know the reason. One of my close sister, dear 
Hive account@ayasha apu told me that, I didn't make any introductory post and its the first reason. She suggested me to do a introductory post.
So thanks to my dear sister, for her suggestion that made me making my introductory post.
And after recording the video, one of my bro, 
Hive account@rehan12 suggest me what to do with dtube and post. He said other things like 
Hive account@nathanmars , what he is doing, his projects like #znap, #linkseven77. I hope I will also being able to make a intro post on linkseven77.
One person I also want to mention is, bro, 
Hive account@hafizullah . We had been long time together last year. Later we as I was not active on steemit, I lost connecting him. But I am pretty much happy to see, what he is doing as a Bangladeshi dtuber.
Hope I will also be a part of the family of dtube. Also linkseven77 if you consider me as your friend,
Thanks to Hive account@nathanmars for helping people in the era of blockchain.
Hoping the best for all of you.
Thank you.
▶️ DTube ▶️ IPFS