If you suspect that the material you're using might infringe on someone else's intellectual property, we recommend not including it in your course. The simplest way to determine whether you can use someone else's content is to contact the owner directly and obtain their permission.
Ultimately, Thkee cannot advise on any copyright issue and takes no responsibility for the material that you place on our platform.
Remember that you retain the rights to all of the content that you place on Thkee and that we are simply the platform through which you deliver that material.