for training videos


机械工程,免费使用 is nowhere near as vast as Udemy for content but it does have some interesting things.

Link to Australian Government training site


The Australian Electrotechnology training package, all courses and units (subjects) 澳大利亚政府的培训计划

Sources of Online Learning

udemy 在线学习

I recommend Udemy for many of it's great training videos, especially in maths, physics, statistics, project management and business.