I generally run hot and cold on YouTube videos. Some are excellent and some are absolutely horrible. The worst, IMO, are done by some dunce who has just received the piece of equipment he is reporting on and is so dim that he must look at the piece of gear to read the name.
OTOH... some videos are really quite good. Grant Atkinson a South African wildlife photographer has a series on the Canon 7D Mark II that are really quite good.
Here is a link to one of his videos. If you enjoy it, you can find his others from this one...
https://www.youtube.com/watch?v=pYFMVnCDqig