Market concentration:

https://www.youtube.com/watch?v=221niTTq05E

Porter’s Five Forces:

https://search.aol.co.uk/aol/video;_ylt=AwrJS9LB.JRb8EEAFisECmVH;_ylu=X3oDMTBybDA1bGNhBGNvbG8DaXIyBHBvcwMyBHZ0aWQDBHNlYwNzYw--?q=youtube+harvard+business+school+porter%27s+5+forces&v_t=aoluk-webmail3#id=1&vid=a54961a17a61e895f8b867efa05316b7&action=view

Retailing:

https://www.youtube.com/watch?v=PdZfyYOpFGI

Food and drink:

https://www.youtube.com/watch?v=jCoz19ShLN0

https://www.youtube.com/watch?v=42iUL2QRf1g

https://www.youtube.com/watch?v=gNkcSWKphCg

Pharma industry:

https://www.youtube.com/watch?v=oQSGX93J50I