I wondered why the page was full of blank areas, it's because of this:<p><a href="https://caniuse.com/hevc" rel="nofollow">https://caniuse.com/hevc</a><p>... the videos are hevc-encoded and don't work for me in eg firefox. (I can see them if I switch to chrome)<p>per ffmpeg:<p><pre><code> Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709, progressive), 1080x656, 1219 kb/s, 60 fps, 60 tbr, 15360 tbn (default)</code></pre>