The bass sounds like it might be Cordell Mosson on his Rickenbacker. I know Bootsy played through his effects on the studio version:
Some commentators of the Houston clip say that the bassist was Glenn Goins him being multi-talented musician. OP's clip was a bit short the song actually continuing into Pussy. Here you can hear George The Master Shvindler say 'Hey Glenn' just before a short bass solo (around 37.30).
Wasn't aware the whole show was up! That's pretty hard to argue with. But on the other hand, he puts a suspicious amount of stank on Dr. Funkenstein at 6:45. He plays it with the same flairs as on the Live '77 CD recorded in an LA show (the trill on the C and D, the popped D every other bar, etc.) and I'm fairly sure that was Boogie on that CD:
Definitely it's Boogie in that January concert or so the record sleeve says anyway. The evidence of Glenn Goins playing bass or not on that OP's clip is as hazy as the video quality and rather unimportant, for the P-Funk Power is what matters. These clips remind me how I loved Parliament Live double album when it was released. Later the DVD exposed the full glory of the show with its huge props and outlandish costumes. But the the main ingredient is/was the loose, captivating P-Funk Pulse created by Boogie/Bigfoot. I'm a huge P-Funk fan and to me that show is one of a kind. No other funk act could get those heights at the time or later.