function videoAPIPeerTube( contentFilename ){
        let file = filesWithMetadata[contentFilename]
        //if (!file) return
	// can be removed for URLs as those are not with metadata

        let contentType = file.contentType

	// mereology option
	let openingOptions = filesWithMetadata[contentFilename].openingOptions
	// can be used via e.g. showFile("https://fabien.benetou.fr/?action=source",{ mereology:"whole"})

	// filtering, only applying what's next to a certain content type and/or with filename filtering with .startsWith() .endsWith() .includes() or regex
        if ( contentFilename.includes("/api/v1/search/videos") ) { // peertube API, not specific enough
		// could verify instead via header i.e x-powered-by: PeerTube
                console.log('it is a PeerTube API call', contentFilename)

		fetch( contentFilename ).then( r => r.json() ).then( json => {
			const rootEl = document.createElement("a-entity")
			rootEl.jsonfromapi = json // rarely so big that it makes any difference to have it twice, on here and on individual items
			// having a root element to attach on makes manipulation later on easier and safer, bringing a context for later modifications
			file.filteredEl = rootEl
			rootEl.test = _ => console.log( 'test' )
			// function that can then be called on the created element later on
			// e.g. filesWithMetadata["https://companion.benetou.fr/saved/pdfxml/3209542.3209570.xml"].filteredEl.nextPage('ok')
			AFRAME.scenes[0].appendChild(rootEl)
			json.data.map( (d,i) => {
				let el = document.createElement("a-image")
				rootEl.appendChild(el)
				el.setAttribute("position", ""+(-1+Math.random())+" "+(Math.random()+1)+" -0.5" )
				el.setAttribute("scale", ".2 .1 .1")
				el.setAttribute("src", contentFilename.replace(/\/api.*/,'') + d.thumbnailPath) 
				el.setAttribute("target", "")
				el.jsonfromapi = d
				el.id = "video_"+d.name
			})


			AFRAME.scenes[0].emit('videoapipeertube_loaded', contentFilename)
			// to use the event consider :
			//AFRAME.scenes[0].addEventListener("videoapipeertube_loaded", e => console.log(e))

		} ); 
	}
        applyNextFilter( contentFilename )
	// can stop here or move on to the next filter that might or not be applied
}
sequentialFilters.push( videoAPIPeerTube )
// adding this to the list of filters to go through, order matters
	// typically one would be generic filters first then more specific ones after