I would say the content is good if it meets two criteria:
First and foremost that its successful from a statistical standpoint. Views, comments and good watch time retention are a good indication of this...if you have 100,000 organic views on your videos and a near 100% retention time then the videos successful regardless of its contents, thats the kind of content that makes people come and stay with you.
The second is a bit more snobbish but it is a good measuring stick and thats technical proficiency. if your video looks amazing and follows the rules and practices of film making/ narrative structure all the while showing proficent use of audio and visual film making then your video would be a success from a technical standpoint...even if it doesnt necissarily get much recognition for that.
the secret I would say is finding the sweet spot between the middle of these two points. all the while balancing a consistent schedule is the key to proper success here...