YouTube is a subsidiary of Google, inc. YouTube's income is not publicly disclosed, but it is estimated in the billions of dollars. They make their money through advertising and direct payments. The direct payments is the movies section of the website where you can watch all new movies: for a small fee.
A court is a tribunal, often as a government institution, with the authority to adjudicate legal disputes between parties and carry out the administration of justice in civil, criminal, and administrative matters in accordance with the rule of law.
Trial is a formal court proceeding where a jury or a judge listens to the facts and evidences presented by parties at dispute and decides on the verdict. A trial is the formal setting where warring parties (parties at dispute) get a chance to present their facts and information in front of an authority that adjudicates on the claims made by the parties.