adding new explanatory videos

[plowsof]

Animated video on the subject of Tail emission:
https://repo.getmonero.org/monero-project/ccs-proposals/-/merge_requests/387#note_22477

the same team have an open CCS idea to create 2 videos on RandomX/Nodes
https://repo.getmonero.org/monero-project/ccs-proposals/-/merge_requests/412

would the tail emission / future videos fit nicely here: https://www.getmonero.org/get-started/faq/#videos ?

[erciccione]

We can put the tail emission video in the videos faq and related moneropedia article. We can see what to do with the other videos when/if they will be created.

[rottenwheel]

New animated video on Monero Nodes. CCS proposal comment.

I definitely think these should be added to the website as it is good work and it is funded via CCS.

[plowsof]

nice, will add to #2244 after feedback