I somehow remember that Herzberg sampler – probably was on it with Freak City Band myself and therefore receiving a copy. Can't find it any more though – and I'm not sure which Hogwash version was on it. Probably the 2011 version which you can find in the first part of the Motorpsycho Herzberg Set from 2011 on motorpsychodelicclips.
The 2008 gig was Motorpsycho's first at Herzberg. If I remember correctly they were on on Friday around 23.00 – 0.45, followed by Colour Haze who played until 2.30 in the morning.
A rather badly lit affair, but well-attended. High-energy playing, Motorpsycho making quite a few new converts. Although Herzberg is usually quite well-documented sound- and videowise, I don't think there are any videos covering the whole gig. Only in 2010 the Hippies United collective started filming very few selected shows, among them the full 2011 Motorpsycho gig at Herzberg.
– To close an old topic: Just found the CD on discogs:
https://www.discogs.com/de/Various-Fill-Your-Hearts-With-Joy-And-Love-A-Lot-Das-Burg-Herzberg-Festival-Live/release/2405818
must have been the 2008 Hoghwash version then…