As practice, try telling a story with your b-roll and planning out a shot sequence. For example, your subject might open a door from the hallway, walk into their office space, sit down at their desk, open their laptop, and begin typing. Seems simple, right? But a shot sequence showing this 10 second scenario might consist of six or more different b-roll clips.
On a global and multilingual standpoint, when doing SEO in multiple languages and cultures, only a native language SEO specialist would truly understand the behaviors, usage, and types of keywords that respond to their market. Outside of the implementation of hreflang and market/language rich keywords, all the same rules apply to multilingual SEO as in regular English SEO.
We still seem to have PageRank as an important ranking factor from Google, but have been told that Google is using a machine learning approach called RankBrain. The focus of this RankBrain approach is to help the search engine understand the meaning of queries better, and provide answers that (still) focus upon meeting the situational and informational needs of searchers.