As far as I know, Veritasium and others occasionally join efforts and coordinate around soon to be published scientific discoveries in a goal to increase exposure. Don’t know if this was the case with the black hole image.

It probably wasn't coordinated, because he got the black hole that was being imaged wrong.

He said we would see a picture of Sagittarius A*, but we actually got the black hole at the center of M87.

They observed both, watch the follow-up: https://www.youtube.com/watch?v=S_GVbuddri8

"The Event Horizon Telescope Collaboration observed the supermassive black holes at the center of M87 and our Milky Way galaxy (SgrA*) finding the dark central shadow in accordance with General Relativity, further demonstrating the power of this 100 year-old theory."

But in the press conference they specifically said they weren’t releasing SgrA* yes because they hadn’t completed their analysis. They released pictures after that?

You're right, it looks like they are still observing Sagittarius A but what they released was only a simulation for that one.

I thought we got both, which is the best possible outcome: no one is wrong and there are more black hole photos.

We didn't get both, we only got M87. Sgr A is dimmer, so it needs more number crunching to get a good image

It's too bad we cannot see the accretion disk edge-on as in the video. That would have made it a perfect prediction. Maybe it's so thin that it's overwhelmed by the projections of the top and bottom of the back side of the disk.

May be we can see higher resolution if we build an additional telescope.

More distant (longer baseline), not merely additional sensors.

Resolving power is proportional to the (virtual) aperture size, not the total sensor area (that gives more signal strength).

Given the observation period has been multiple years, does that virtual size include the orbit of the Earth? Or is there something that limits it to still being Earth-sized?

So put some telescopes in orbit around the Moon and Mars.

A guy on Reddit actually asked this in the AMA. While that would increase the resolution, it would also be extremely difficult. The algorithms used to combine the data from the dishes relies on the exact position of the dish being known at the time of measuring, to a precision of fractions of millimeters. It's already hard to do on the earth's surface, but imagine doing it with a sattelite zipping around the earth at 20K km/s, or the moon at >1 km/s around the earth, or Mars at 24K km/s around the sun.

Not to mention getting the data back down here. For the analysis of M87, there were multiple petabytes generated: they had to use good old sneakernet and ship hard drives.