Regarding HW errors the miner had run just few minutes and you mostly see hardware errors more while mining with CPU and GPU. Good ASIC devices will have them very less. And in video after running for few minutes its not necessary that cgminer shows errors.
This statement is complete and utter crap. I don't think I have ever seen a H/W error while mining with a GPU or CPU except when there was an actual problem with the device. Typical H/W error rate on these devices is vanishingly close to 0%.
Conversely, I have never seen an ASIC mining device that did not regularly produce at least a ~1% H/W error rate.
Your statement above does not go a long way toward helping your credibility.