Storing videos for a YT-like platform

Hi, there. I was searching for a solution to host videos for my YouTube-like platform and I found Dropbox. Not only host, but also something that serves them, so that they can be accessed by the viewers (in this particular case, I suppose that the maximum number of viewers will be 10,000). So I guess it will envolve some amount of data traffic. However, I will use the storage for basically two actions: upload the videos, then retrieve the videos (in this case from Brazil, that is where the viewers will be). Maybe I'll need some CDN service on the side, too. I don't know if Dropbox has a mirror server in Brazil... there must be some. I even picked the 3TB plan (Essentials, for the beginning), but in reality, the mininum I need is 10TB. However, beforehand I want to make sure this is the right place for me. For example, let's suppose I upload a video file (in this case a MP4 one). I even took that test, and I could copy the link... Something like "https://www.dropbox.com/scl/fi/code123/file.mp4?rlkey=key546&dl=0". But I need to embed the link in my video player, so I had to do this: "https://dl.dropboxusercontent.com/scl/fi/code123/file.mp4?rlkey=key546&dl=0".  Ok, so far so good. The matter is that those links can be publicly accessed. Is there any way of protecting their accesses via API? And speaking of APIs, does Dropbox offer any API for those actions: upload, get the video link for embed, delete the video, and create/delete folder?