Copyright ITTF and NBC and The Olympics.
I cannot find any way to purchase these, so I don't have a moral issue with sharing.
These weren't recorded in high quality to begin with, then it appears YouTube down-sized them even more. You may want to reduce your screen resolution to help compensate.
This channel and these videos are not monetized. If you do see an ad, the proceeds are going to the copyright holders, not me. I'm doing this as a public service.