I might watch too many anime, but Kurzgesagt in Japanese really feels like I'm watching a short anime :D
Have a try:
存在しないはずの(でも存在する)ウイルス
https://www.youtube.com/watch?v=mFzz_gRJbTE
English ver.:
This Virus Shouldn't Exist (But it Does)
https://www.youtube.com/watch?v=1-NxodiGPCU
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English ver.:
This Virus Shouldn't Exist (But it Does)
https://www.youtube.com/watch?v=1-NxodiGPCU