I've been experiencing the same thing with Social Vibe videos since the most recent WGT update. I watch (yes, I actually watch them), let's say, videos worth 60 credits; I receive 20 credits. This has been a consistent issue across 5 different browsers. All browsers are running the latest Flash version, caches are cleared daily, yada, yada, yada,
I have noticed that sometimes when I log in the next day some of the credits due me have been awarded. This suggests that, whereas previously video credits had been awarded immediately, there is now a significant delay for some reason.
I continue to be appreciative that WGT offers players ways to accumulate credits via videos & surveys.
However, watching videos is not free to me in that my time is expended. Having my time wasted in this way leaves me feeling rather disgusted. The bottom line is that this bug is yet one more reason for me to do something else with my free time.
Hopefully one of the forum moderators will read this thread, respond, investigate, and provide us with resolution. Thank you in advance!