Some nice YouTube channels:

• ICTP Mathematics. (Seminars, Graduate students, ...)

• ScienceEtonnante.  (Vulgarisation, Fr )

• TSMS Seminar.  (Seminars by PhD students and young researchers)

• ...

Some useful sites for recorded seminars and talks:

• http://www.birs.ca

• http://library.cirm-math.fr

• https://www.carmin.tv/en/

A great resource for bachelor's students: 

• http://exo7.emath.fr/  

Interests: 

• Chess

• Sport: football, jogging

• Blockchain

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