You can make reasonable quality video from your Smartphone or Professional camera for any event such as product launch, new product's review, the best place, tourist hotspot, educational presentation and so on then upload them to your YouTube account. I suggest you to video record for 2 to 5 mins max unless source or certain products need it to record more than 5 minutes to an hour or so.
Try to avoid shaky videos by using some fixed object or by using its stand (like Simpex 333 Tripod) to record in a professional manner. You may check video setting by taking trial video before taking real video to shoot, record and use. Make sure that all the memory is enough to capture and save it.
Once video is recorded, try to upload in your system as soon as possible in order to save it from unavoidable memory flash issues. Try to check the quality of video, audio and presentation from your system by going through each second. Once everything is OK, you may then rename the file name with important even keywords in order to search engine identify it upon visitors' search. Most of them lacks here by using wrong or default file name without proper keyword.
You can then upload the video from your system to YouTube account by again using exact file name or keyword to get the attention of search engine. Once everything is done perfectly, you may manually need to click on $ symbol to associate it with AdSense for showing up its ads. The more visitors in quick time comes, the more chances of ad clicks (as CPC) can result which can benefit. The more visitors in longer duration may not help since they just accumulated total views than huge traffic per day.