Martha wants to add a video to her presentation that supports her argument. she cannot find the creator of the video so she decides to use the video without citing the source. is this considered plagiarism?

Yes. It will be considered a plagiarism.

Explanation:

Plagiarism is a word used for the "wrongful appropriation" and "purloining and printing" of different author's "writing,  expressions, opinions or concepts" and the description of them as one's own unique production. It is regarded as the academic dishonesty and a violation of publishing ethics. Therefore, if one is using the video of another without proper citation it will be regarded as plagiarized.

acts of terrorism occur globally. the united nations global counter-terrorism strategy was created in order to build adequate systems of support and solidarity with victims of terrorism. here´s a summary of the proposed key themes: the importance of giving victims a face and a voice; protecting their dignity; giving victims legal status and defending their legal rights; providing victims with medical, psycho-social and financial support; building solidarity with victims; improving media coverage of victims; and focusing on the link between victims and counter-terrorism efforts more generally.