Disadvantages
People who are interested in the making process of a sculpture might require any number of additional trainings regarding metal welding (for more information check out the manual p. 57)
A disadvantage is that it requires specific tools and equipment to make a sculpture(such as metals, a welding machine, etc.), therefore it could be expensive (manual p. 57)
A pottery making or wool craftwork workshop via video tutorial is of course not as beneficial as to visit a workshop in person as knowledge passes from mentor to student more easily and much faster through personal interaction, which is not possible for an online tutorial (manual p. 69, 75)
One disadvantage of video tutorial is the passive form of knowledge transportation, instant corrective or supportive feedback is not possible (manual p. 69, 75)