Chrome extension. Move your mouse cursor over any video and set loop in a portion/range.
-  Arabic /ar/
-  Amharic /am/
-  Bulgarian /bg/
-  Bengali /bn/
-  Catalan /ca/
-  Czech /cs/
-  Danish /da/
-  German /de/thanks to @Pdzly
-  Greek /el/
-  English /en/
-  Spanish /es/
-  Estonian /et/
-  Persian /fa/
-  Finnish /fi/
-  Filipino /fil/
-  French /fr/
-  Gujarati /gu/
-  Hebrew /he/
-  Hindi /hi/
-  Croatian /hr/
-  Hungarian /hu/
-  Indonesian /id/
-  Italian /it/
-  Japanese /ja/
-  Kannada /kn/
-  Korean /ko/
-  Lithuanian /lt/
-  Latvian /lv/
-  Malayalam /ml/
-  Marathi /mr/
-  Malay /ms/
-  Dutch /nl/
-  Norwegian /no/
-  Polish /pl/
-  Portuguese (Brazil) /pt_BR/
-  Portuguese (Portugal) /pt_PT/
-  Romanian /ro/
-  Russian /ru/
-  Slovak /sk/
-  Slovenian /sl/
-  Serbian /sr/
-  Swedish /sv/
-  Swahili /sw/
-  Tamil /ta/
-  Telugu /te/
-  Thai /th/
-  Turkish /tr/
-  Ukrainian /uk/
-  Vietnamese /vi/
-  Chinese (China) /zh_CN/
-  Chinese (Taiwan) /zh_TW/