Natural light is the best lighting you can use when filming for YouTube. Successful YouTubers use studio type lights or white lights, which also give you good lighting. But natural lighting is the best. Make sure you have the lights facing you and not behind you. Be aware of where shadows are and make sure they are not covering the main focal point of your videos.  Backgrounds are also good to have. You can buy or make backgrounds. To purchase a cheap background, go on eBay or other selling sites to find a simple, white background. Alternatively, you can film you videos outside at places like the beach, your local park, or even your backyard. Consider purchasing a green screen, this way you will be able to make your own backgrounds for your videos. Webcams are out. The video and audio quality are not very good on webcams, so try to invest in a good video camera. It doesn't have to be a $500 camera, it could cost $20 as long as the quality for audio and visuals are good your video will be good too.  Many digital cameras now have excellent video capacity. Look for used options on auction sites or classifieds if you haven't a lot of money to spare. Some great sites to find used cameras are eBay and Craigslist. The latest mobile phones are also capable of creating good videos. Consider using a tripod to avoid having a shaking video effect. This only applies if your video involves you recording your screen. HD videos are the norm nowadays, so make sure it can record at 720p or above.  It is best to invest in one rather than download a free one as they often have a "Free Trial" or "Demo" watermark across the screen on export. If your screen recorder does not have options to record audio as well then you need to invest in a good quality microphone - or another screen recorder. One many YouTubers use is the "Blue Snowball" or "Blue Yeti", but any cheap, high-quality microphone will do the job. Choosing tags is a pretty important step in the video upload process, choosing popular tags will make it harder for people to...

TL;DR in Vietnamese:
Nâng cấp kỹ thuật quay phim. Mua một chiếc máy quay phim chất lượng hoặc sử dụng điện thoại thông minh. Quay phim màn hình với phần mềm chất lượng cao. Gắn thẻ phù hợp cho video. Mô tả kênh Youtube của bạn trong khung mô tả. Đăng tải đều đặn để duy trì số người đăng ký. Tránh đăng tin nhắn rác trên tài khoản của người khác. Tự tin trước tình hình bi quan. Đánh giá các sản phẩm có liên quan.