I echo the sentiment that there aren't a lot of Asian people on Mastodon. Although it seems that vivaldi.net is mostly Japanese people.
Asians are mainly using their national instances. Several largest Mastodon instances are Japanese (Pawoo, mstdn.jp, Fedibird), there are also pretty large Korean (planet.moe) or Chinese ones (m.cmx.im, alive.bar, wxw.moe). Outside East Asia, Asian instances tend to be small, though.
Checked with your instance (feddit.nl), community's instance (sh.itjust.works), and with lemmy.world. None show a thumbnail, but all can play the video (at least on default interface).
Indeed, for some reason, the video cannot be viewed when opened in another browser tab
Isn't it like https://kbin.world was back then? (when /kbin was still a thing?)
When you entered that page, it determined your location from IP address and redirected you to a magazine for your country, as shown on kbin.social.
Well, this could be repeated now, but for lemmy instances. We already have umpteen of regional/local ones, and they are on every continent of the world.
They are actually tankies