The best way to assess the quality of information found online - whether it's a website, YouTube video or podcast - is to apply the C.R.A.P test :
C - Currency - When was the website information last updated? Is the information current?
R - Relevancy - How relevant / accurate is the information to your task?
A - Authority - Who is the author of the website’s information? What are their qualifications? Can the author be trusted?
P - Purpose - Why does the website exists? Was it created to sell or persuade? Think about biases.
The video below is a visual representation of the CRAP test application:
References
UTS Library. (2016, March 8). Evaluating Information : The C.R.A.P. Test [Video]. YouTube. https://youtu.be/z0VF3kh1ffk