Most people use one of the two more popular Yabause forks, Kronos or YabaSanshiro. Both of these are current emulators originally forked from the Yabause code. You should theoretically have an easier time compiling either of these, or just download pre-built versions.
The only thing that can deal with the 50/60hz issue is a physical mod with a switch to your saturn, a cart won't help with this.
As far as the video issue, I really have no idea, but I don't see why it would.
Fenrir can sort of do it, if you use the webserver firmware. You wouldn't be able to upload binaries directly, but if you prepared disc images it'd load that over the network just fine.
Otherwise SDLoader would work well. There are dev carts, but the ones with that sort of functionality I don't...
I ran into the same SMD problem with my fenrir'd va0 jpn saturn very recently. I decided I didn't want to deal with the SMD caps and just bought a new fenrir duo to put in my NA not-va0 saturn. For me it was just the "black screen of death" issue.
There are other people here way more technically minded then me, but to me it looks like your saturn hardware is starting to fail. Is this a stock saturn with a retail game, modded, using a "cart" for loading games, or?
To me it looks like something on your physical saturn is starting to fail...