French term (edited): pastille d\'animation

After lengthy consideration, I think this is the best option. None of the others proposed here fully convinces me, but I think this one ticks the boxes, as they say.

What do we know about "pastilles"? They are short, no more than a very few minutes, they are basically TV-related (actually radio too), and they are a programming phenomenon: they are interspersed between longer programmes, and sometimes occur as interludes in the course of a longer programme.

Let's recall the definitions already cited:

"En jargon télévisuel, une pastille est un programme court, très court (deux minutes ou moins), souvent intercalé entre deux émissions. Une manière de distraire le téléspectateur et de multiplier les plages de pub. Il peut s'agir de reportages courts, tels « Du côté de chez vous », petite émission déco parrainée par Leroy Merlin sur TF1, ou « D'art d'art » sur France 2, mais aussi de fictions plus audacieuses, comme « Bref » sur Canal +."
http://www.leparisien.fr/loisirs-et-spectacles/pastille-17-0...

"Autre nouveauté annoncée pour la rentrée, un programme court (appelé dans le jargon « pastille »), fait pour et avec les enfants sur des thèmes d’actualité ou de société, intitulé 1 Jour, 1 Question."
https://tuauraslesyeuxcarres.wordpress.com/2014/08/27/rentre...

It's certainly not necessarily a film as such, but neither is it necessarily (or even usually) a "bump" or "teaser".

So they can be creative fictional pieces or topical, but they can also be commercial or advertising/marketing-related. The latter point is confirmed here:

"Une pastille publicitaire radio est une petite introduction faite à l’antenne par un animateur juste avant la diffusion du spot de l’annonceur.
La pastille radio permet de mieux intégrer la publicité dans la continuité du programme pour favoriser l’attention et permet également d’utiliser la voix de l’animateur comme « caution » pour l’annonceur."
https://www.definitions-marketing.com/definition/pastille-pu...

Well, "interstitial" really fits those specifications pretty well. Although the word carries strong connotations of advertising because of its use as an Internet term, where it refers to those ads that you get while your page is loading, in the audiovisual/TV context this is by no means necessarily so, no more so than "pastille".

"interstitial: A short show (up to 5 minutes) that is broadcast in-between full length shows."
https://motionworks.net/broadcast-terminology/

"In television programming, an interstitial program (or wraparound program or wraparound segment) refers to a short program that is often shown between movies or other events, e.g. cast interviews after movies on premium channels. The term can also refer to a narrative bridge between segments within a program, such as the live action introductions to the animated segments in the Disney films Fantasia and Fantasia 2000, or the Simpson family's interludes during their annual Treehouse of Horror episodes."
https://en.wikipedia.org/wiki/Interstitial_program

A good example, much cited on the web, of how an interstitial can be a very brief item within a programme is the fact that The Simpsons started life as an interstitial in the Tracy Ullman Show, though admittedly bookending the commercial breaks:
https://en.wikipedia.org/wiki/The_Simpsons_shorts

"As show producer James L. Brooks recently told The Hollywood Reporter, he wanted "Ullman" to feature short animated interstitials, and had liked Matt Groening's "Life in Hell" comics so well he invited the cartoonist to submit some ideas."
https://www.today.com/popculture/simpsons-made-their-tv-debu...

An example from the BBC:

"BBC Worldwide Channels introduces a new series of interstitials starring Polish children on the CBeebies channel this July.
Entitled My Favourite Things, each of the six 45" to 60" spots was filmed in Warsaw on 10 June and features Polish preschoolers talking about the things they enjoy most – from 'My Favourite Toy' to 'My Favourite Story'. The bright and colourful spots will be packaged with distinctive CBeebies branding."
http://www.bbc.co.uk/pressoffice/bbcworldwide/worldwidestori...

Perhaps most telling of all is that "animated interstitial" is very much a standard term in the animation industry. The following is well worth reading:

" Short Stops: Animated Interstitials
Joe Strike talks to several animation production companies about the growing need for interstitial programming around the globe.
Once upon a time -- that time being Saturday morning 34 years ago on ABC-TV -- there was Multiplication Rock. The three-minute long cartoon math lessons set to music proved so popular, they led to similar series covering grammar, science, American history, money and computers under the umbrella title of Schoolhouse Rock. [...]
For many kids in the U.S., Schoolhouse Rock was their introduction to interstitials -- short form segments serving as a bridge between full-length programming. The overall quality of TV cartoons has risen dramatically since the 1970s -- and so has the demand for interstitials. Now some of those same kids are creating or commissioning the next generation of these short-form bursts of animation."
It goes on to refer to Rintindumb, a Lucky Luke spinoff from the French studio Xilam; I'm convinced these would be called pastilles in French.
https://www.awn.com/animationworld/short-stops-animated-inte...