Can you pull video through one of these x1 adapters ?
Eg can you access bios and stuff through x1 or you need x16 for any type of video stuff ?
Why couldn't you?
It's still a legitimate PCIe connection, all protocols will work as expected. The only difference is you get far less bandwidth (fewer receiver/transmitter lanes) this way.
I've heard even some gaming can be done but with some slowdown on graphic intensive parts.