Official free anime on YouTube

While there is many of non official anime uploads on YouTube, there is also official uploads, which is legal to watch. Many of them is different ONA (anime specially made for releases on the net), and some a separate episodes of TV series. To make search for them easier, I did made small list of official anime uploads:

ONA
Pokemon Generations (Jap) - https://www.youtube.com/playlist?list=PLBE2D9BnJJUr3eL0gJwgbWbXqPaOFZI5p
Pokemon Generations (Eng) - https://www.youtube.com/playlist?list=PLQWzKIaERirwv9M89dxN3bNLY0PyuChOU
Pokemon: Twilight Wings (Jap) - https://www.youtube.com/playlist?list=PLBE2D9BnJJUottgTqK-Daoqx-G5IBHg7P
Pokemon: Twilight Wings (Eng) - https://www.youtube.com/playlist?list=PLQWzKIaERirwfvHB3m8CjnTK6ZzNA8wvJ
Pokemon: Twilight Wings (Kor) - https://www.youtube.com/playlist?list=PLi-MwfPpkXIJuO4fjl-IsdXNLgWvsPOOz
Monster Strike - https://www.youtube.com/playlist?list=PLXAstZgpW4dtkwFNF7sU9wY_E7Cfg-3ap
Monster Strike: The Animation - https://www.youtube.com/playlist?list=PLXAstZgpW4dtyOXsK0SuCkSqZdatsXuTH
Kyou no Asuka Show - https://www.youtube.com/playlist?list=PL0F8FE0B28B3C5CBB
Denjarasu Jii-san - https://www.youtube.com/playlist?list=PLC3F12FFE65DF5980
Ojamajo Doremi: Owarai Gekijou - https://www.youtube.com/playlist?list=PLGLzhXoyF5rKjBXg1JWO2PGOHoTt9Mhf0
Agukaru - https://www.youtube.com/playlist?list=PLx86mGf-8WBr6CXeuYy64R3dkOYWFVhv2
Masamune Datenicle - https://www.youtube.com/channel/UCMGfgxAFmHjPwy8WBToRTkA/videos?disable_polymer=1
Seibu Tetsudou Ekiin Tako-chan - https://www.youtube.com/playlist?list=PLBC0D2A0056EA7E80
Potecco Babies - https://www.youtube.com/playlist?list=PLEAA66EEB220E1B9B
Onyankopon - https://www.youtube.com/channel/UCEQVXMPWlSpMWCqu4A6TMuw/videos?disable_polymer=1

Small ONA
Battle Break - https://www.youtube.com/watch?&v=UZH9D4GMn9Y
Chuuko Video-ya no Onna Tenin X - https://www.youtube.com/watch?v=u1Ou7oClL40
Sorette Dakara Ne! - https://www.youtube.com/watch?v=Vng_FHwBct4
Gundam VS Hello Kitty - https://www.youtube.com/watch?v=rr8to7eqn6c
Kobe to Watashi  - https://www.youtube.com/watch?v=6gPHGzqKRU0
Wonder Garden - https://www.youtube.com/watch?v=iwZWK2WoogY
Neon - https://www.youtube.com/user/npbproject
Rui no Masaiban - https://www.youtube.com/watch?v=FytWE7BEkoc
Yonhyakunijuu Renpai Girl - https://www.youtube.com/watch?v=HHZQuTCw1p0
Neo Satomi Hakkenden: Satomi-chanchi no Hachi Danshi - https://www.youtube.com/watch?v=3rWVS7cqByM
Bokura no Saibanin Monogatari - https://www.youtube.com/watch?v=lgEi6XwuZOc
Mahou Tsukai Nara Miso o Kue! - https://www.youtube.com/watch?v=1T8kB2nF3BI
Toki wa Meguru: Tokyo Station - https://www.youtube.com/watch?v=NDSOxDaLzOA
Gori Papa Ikka no Nougyou wa Omoshiroi - https://www.youtube.com/watch?v=w9J5qY0azo8
Shake-chan - https://www.youtube.com/watch?v=WzzgOdvPgIU
Magunekko - https://www.youtube.com/watch?v=0NAh6MWGjmg
Toukiden Kiwami - https://www.youtube.com/watch?v=8K2rXsis-B0
Houseki no Kuni - https://www.youtube.com/watch?v=3pzIQ54cwiA
Fumiko no Kokuhaku - https://www.youtube.com/watch?v=0QqT1P4VO30
Rain Town - https://www.youtube.com/watch?v=RLAfM1RXwRs
Chiruri - https://www.youtube.com/watch?v=_VK2il0LnOY
Mahou Tsukai Jiji - https://www.youtube.com/watch?v=7fcQKd00HrE
Next A-Class - https://www.youtube.com/watch?v=EQq6Z4IowfY

TV Series Episodes
Croket! 01 (Part 1) - https://www.youtube.com/watch?v=-QHIfaiXd94
Croket! 01 (Part 2) - https://www.youtube.com/watch?v=XLdUAHu3SjQ
Shin Seiki Duel Masters Flash 01 (Part 1) - https://www.youtube.com/watch?v=6XmkZ8eJgCQ
Shin Seiki Duel Masters Flash 01 (Part 2) - https://www.youtube.com/watch?v=gndRobdXt_4
Hamutaro 01 (Part 1) - https://www.youtube.com/watch?v=NmYxkDa6Jxg
Hamutaro 01 (Part 2) - https://www.youtube.com/watch?v=zD8z2sHraDc
Gakkyuu-ou Yamazaki 01 (Part 1) - https://www.youtube.com/watch?v=AYEbSmU2U4Q
Gakkyuu-ou Yamazaki 01 (Part 2) - https://www.youtube.com/watch?v=y0Zbyj66bak
Bakusou Kyoudai Let's & Go!! 01 (Part 1) - https://www.youtube.com/watch?v=D6YQjEUQfh4
Bakusou Kyoudai Let's & Go!! 01 (Part 2) - https://www.youtube.com/watch?v=vsEOn67I-BI
Bakusou Kyoudai Let's & Go!! 01 Max (Part 1) - https://www.youtube.com/watch?v=ML9MWfmTRYE
Bakusou Kyoudai Let's & Go!! 01 Max (Part 2) - https://www.youtube.com/watch?v=8g1xMaa-L_g
Bakusou Kyoudai Let's & Go!! 01 WGP (Part 1) - https://www.youtube.com/watch?v=MB-IQESMh3g
Bakusou Kyoudai Let's & Go!! 01 WGP (Part 2) - https://www.youtube.com/watch?v=nd-6zSipgBk
Honoo no Toukyuuji: Dodge Danpei 01 (Part 1) - https://www.youtube.com/watch?v=Xn4o-Z6kkWE
Honoo no Toukyuuji: Dodge Danpei 01 (Part 2) - https://www.youtube.com/watch?v=JwNzItywly0
Uchuujin Tanaka Tarou 01 - https://www.youtube.com/watch?v=67PHaLV76g0
Saru Gecchu: On Air 01 - https://www.youtube.com/watch?v=4qai3puh8Cs
Saru Gecchu: On Air 02 - https://www.youtube.com/watch?v=QqMzU7nqjfk
MAR 01 (Part 1) - https://www.youtube.com/watch?v=SZCuhD3F5bY
MAR 01 (Part 2) - https://www.youtube.com/watch?v=IXxGO7nMG4A
Beyblade Burst 01-02 - https://www.youtube.com/playlist?list=PLfX0BhjZoHNlB3ejsDrglbXUVsWYaJG55
Beyblade Burst Turbo 01\45 - https://www.youtube.com/playlist?list=PLfX0BhjZoHNn7dMqSqIeqX51yywYqLutM
Beyblade Burst Evolution 1\51 - https://www.youtube.com/playlist?list=PLfX0BhjZoHNlICcXmLjJkEdY4wJmncvWm