Animation problems UN4

Hi all , need help , i have animation problems , i saw tutorial∈dex=5&list=PLL0cLF8gjBpqA8DcrhL_O9kD4jsUqhDR6 i have downloaded character + animation from Mixamo , but have a problem during running animation, the animation loocks like playing it again and again , also have problem with jumping : Un4 animation problems - YouTube any ideas how can i fix that ?

i found some info about problem during importing from Mixamo , one option to fix that by using RootMotion , but now my 3d character animation “broken” when character running, head loocks up now , it terrible loocks , maybe any one know another solution ?