While it is very possible to make successful videos off-the-cuff, creating a script will help you deliver consistent programming. The script will keep you from veering off the theme of your video, as well as help focus your content for your audience. In the situation of a vlog, you might want to make an outline of what you want to say and go ahead and ramble. Some of the best vloggers do this and then cut out the footage where they say "um." The most successful videos are ones where the creator is doing what he or she likes. Don’t try to follow the crowd and produce videos mimicking popular trends. You will be far more successful if you make what you want to make, and focus on polishing and building that. The introduction is one of the most important parts of a video. It should grab the audience’s attention, lay out the themes and direction of the video, and keep the viewer wanting more. You can do this with personal introductions, graphics, clips of what’s to come, and more. Keep your introduction powerful but short. Viewers are not likely to sit through more than 10-15 seconds of introduction. This includes titles, graphics, and lead-ins. Hook them quick and then dive in to the main content of your video. It is essential that your video’s pacing keeps the viewer from becoming bored. Don’t linger on uninteresting subjects, and keep the action moving forward.  Don’t try to cram too much information into one segment. If you are producing informative videos, consider breaking up the content into multiple parts. This will keep the audience from becoming overloaded with information. On the flip-side, make sure that you have enough content to justify the length of the video. If the viewer becomes disinterested, even for a second, they will most likely leave to find another video. For longer videos, add small section breaks where the pace slows down a little. This will give the audience a moment to reflect on what they’ve seen so far before you move on with your content. At the end of your video, don’t just say...

TL;DR in Vietnamese:
Viết kịch bản. Quay những gì mà bạn biết. Mở đầu video bằng sự dẫn dắt. Cân bằng nội dung. Kết thúc video bằng lời kêu gọi hành động.