MUBI is a streaming service for film lovers. As of December 2020, students and faculty can sign up for a discounted account using your GC email address. (In December 2020, MUBI discontinued its film schools program which offered free accounts to faculty and students; those with existing free accounts will retain them as VIP accounts). MUBI offers a rotating selection of streaming films, and a newly expanded library of on-demand films. Browse their catalog here.
When searching for streaming videos, head to the Advanced Search page in OneSearch. Select whether you want to search GC-only or expand the search to All CUNY libraries (this is useful if you have a dual affiliation). Set the first search filter to Title > Starts With and enter the name of the film you’re looking for. In the Material Type dropdown on the right, select Video/Film, then click the green search button on the lower right. See the sample search here for the documentary, "The Split Horn: Life of a Hmong Shaman in America" (2001):
On the results page, look for "Available Online" (as shown in the second item listed below) to locate a streaming version of the film: