Format: 

Lastname, Firstname, function(s). "Title of Clip or Segment." Title of Film or Collection, contributor(s) function(s) by Firstname Lastname, Distributor, Day Month Year. Database Name or Title of Non-Publisher Website, URL. Accessed Day Month Year.

Lastname, Firstname, function(s). "Title of Clip or Segment." Title of Film or Collection, contributor(s) function(s) by Firstname Lastname, Distributor, Day Month Year, URL or DOI (when accessed from the publisher's website). Accessed Day Month Year.

Examples: 

"Gotham Season 2 Preview: Batman Villains Rise." YouTube, uploaded by Emergency Awesome, 21 July 2015, youtube.com/watch?v=m4nCn1tiItw. Accessed 12 Dec. 2017.

In-text: ("Gotham" 00:32:15-57)

Building Mathematical Competencies in Early Childhood. Produced by Frances Davidson, directed by John Davidson, written and narrated by Jeanine Brownell, Jie-Qi Chen, and Jennifer McCray, Davidson Films, 2012. Films on Demand, fod.infobase.com/PortalPlaylists.aspx?wID=78909&xtid=52082.

In-text:(Building 00:46:52)

Young, Rick, director. "The Trouble with Chicken." Frontline, Public Broadcasting Service, 12 May 2015, pbs.org/wgbh/frontline/film/trouble-with-chicken.

In-text:("The Trouble" 07:15:02-18:03)

Notes: 

The first example shows how to cite a video clip posted to a social media website such as YouTube. In these instances, include the creator/poster's username as in the first example (MLA 24); if you know the creator/poster's real name, you can include it in parentheses (MLA 102). Because uploaded videos can easily be removed, it is also a good idea to provide an access date for videos that you are citing from non-academic sources (MLA 53). The second example shows how to cite a full-length film available through an online database such as Films on Demand. You may include any contributors you deem necessary such as director(s), producer(s), screenwriter(s), or creator(s). When the title of the video is in the first position place the function of the contributor before the name (e.g. Directed by Rick Young). Contributors should appear between the title of the film and the distributor and must be preceded with an appropriate function. If you are emphasizing the contributions of a specific individual, begin the citation with that person's name (see second example) (MLA 24). For in-text citations, you can use a time-range instead of a page number as demonstrated above (MLA 57). If you are not citing a specific individual, use the first word or noun phrase (first noun along with any preceding adjectives) of the title for the in-text citation (MLA 56).

Source:
MLA - p. 33, 44