Who has the best claim to the title of Roman Emperor?

Thanks to all the channels that participated:

Stefan Milo:
https://www.youtube.com/channel/UCZ9jWH_8tJ-Nmaj8dSQdEYA

Al Muqaddimah:
https://www.youtube.com/channel/UCf0O2efB4K66UUaT7QJPVNA

M. Laser History:
https://www.youtube.com/channel/UC-JWw2juO3Ikj5C9VsNoGIw

Jack Rackham:
https://www.youtube.com/channel/UCaQzyr4MWn1b9W4TdpxxeKw

A Long, Long Time Ago:
https://www.youtube.com/channel/UCFQil7fsvemvnF3cmhnBFFQ

This is Barris:
https://www.youtube.com/channel/UCfveSKkxngPNNHLoDhqjaOg

History & Headlines:
https://www.youtube.com/channel/UCQ38_Et4NgYVS7MpwbXy-3Q

The Cynical Historian:
https://www.youtube.com/channel/UCN5mhhJYPcNUKBMZkR5Nfzg

Fiveable:
https://www.youtube.com/channel/UCxnnTFTsVttnVo190h_-wZw

Tom Richey:
https://www.youtube.com/user/tomforamerica

House of History:
https://www.youtube.com/channel/UCjvbQ_ZRQ0EH6qVYQ9ApXCw

Hikma History:
https://www.youtube.com/channel/UCsaViv1SDQy2FcRFHrf_Dkw

History's Who Yesterday's Nation:
https://www.youtube.com/channel/UC2CDncVJtj0KebazKrs2gLw

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Who Would Be Tsar of Russia?
https://www.youtube.com/watch?v=Xq_4iRRO4tU

Intro music: "Lord of the Land" by Kevin MacLeod and licensed under Creative Commons Attribution license 4.0. Available from http://incompetech.com

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