These two users (probably controlled by the same person) steal other people's videos, take audio with voices and then make a screenrecording to it:
1. https://www.youtube.com/channel/UCYJJxjVhAoa16cqYhFs7kqw
https://bitcointalksearch.org/user/kholiqaq-1843240 kholiqaq (red trusted by Lauda for machine translations in bounties)
0xd7ad01340be54c1bd777a7b1715db5659239782c
Examples of stolen content (audio with voice):
Stolen: https://youtu.be/lvZNq05oSG4
Original: https://youtu.be/MpJ7iybDaW4
2. https://www.youtube.com/channel/UCARKimxTyUObldic38ZERZQ
https://bitcointalksearch.org/user/ejof-1978573 ejof
0x4be0d62fc296136326f1a6bb6e3a543472c41820
Examples of stolen content (audio with voice):
Stolen: https://youtu.be/9E7qNGiKq9c
Original: https://youtu.be/oxKxUM_BqJk
These are not isolated cases, but just examples. There's not a single original video on these channels, all of them are made by different voices, and I have already found and contacted some of the owners, so they can now report them on Youtube to ban their channels.
If you also create videos, check their/his channels, maybe he's stolen some of your content too.
UPD.: Yes, they're really controlled by the same person. Proof:
https://docs.google.com/spreadsheets/d/1gFRkhgoVNyF-lXioQRLN6KBKHH5Dab9-yhAxnvxXPdQ/edit#gid=243644804