I use brave in my phone and both sites the video wasn’t working make sketchy sites as i have as blockers in. Used safari and the link in OP loaded but took forever to render before it would play. Even in safari though the conservativus.com site when i click on where the video should be, it says video cannot be loaded due to server error.
I use Brave as well and no problem with this video.
That said though, I occasionally have problems Brave showing a video that Safari works fine with. My attitude is that it’s the content poster’s problem and move on. I’m not dropping the blocks.