It should be noted that the fork in that video--a suntour xcr, is actually worlds better than the forks on department store bikes and probably your bike in that it actually does have a oil damper, it just happens to be a sealed, nonserviceable cartridge that is intended to be replaced outright when worn or broken. It's not great, but not a pogo either. The're found on entry level bikes sold at independent biculycle dealers, not mass market merchants.