that is indeed an important point to consider. in case one intends to engage in the practice of clip making then he or she should put in the effort to provide value nd not merely re post. The clip should be edited nd commentaries, captions or analysis added in order to make it uniique.
Clipping will definitely be effective but do not treat it as a simple copy nd paste process. make every clip different by changing its pace giving it context or emphassizing its important parts. this is going to not only make the content interesting for the audience but it is also going to help u differentiate from the crowd of mass uploads.
you can clip other channel content as long as you follow the fair use policy, however there is still a risk that they may send a strike, things to keep in mind is other than adding transformative value to your video, also add credits to these original video creators.
