For an alternative to Mastodon, and maybe facebook, i recommand iceshrimp. It's a misskey fork with markdown, 3000 chars, emojis reaction, list, gallery management...
Two alternatives to lemmy. They have lot interresting features : mbin and piefed.
As for pixelfed, lot users reported me some bug. I have heard of vernissage but i haven't tested them.
Alright, so following the mail metaphor: lemmy is unable to send a video attachment so it can't allow you to upload videos to peertube; however, activity pub could allow for that
I'm not sure that would be the correct metaphore. Lemmy can send video attachement. But your lemmy account is not allowed to upload video to peertube so you can't send any video.
There is also an economical reason : a video is ressource hungry.
So it is limited to watching peertube video. Let's imagine 1000 lemmy users uploading video to peertube...
pixelfed (probably supported but i don't know well mbin)
Lemmy
peertube : i got bad result with peertube but maybe over time they solved it, i haven't retested it. It was possible but you had to manually retrieve the video
mastodon : not supported.
People from mastodon, pixelfed...can post on lemmy, mbin, piefed. They need to mention the forumverse community. Eg : @forumlibre@jlai.lu
I often recommand this formatting on mastodon :
The first paragraph will be the title
And i chose the community where i would like to post, eg : @forumlibre@jlai.lu
Yes as @Chookitypok@piefed.social said, the forumlibre (casual conversation) is the best place to pratice. We talk about music, movie, book, videogame... :)
Donc hésites pas à publier là-bas. S'il ya le moindre problème, nous sommes là. :)
@edouard_lopez@piaille.fr
Interesting, thank for the poster. Nice project ! :)
In case you didn't know, your poster arrived here : https://lemmy.world/c/firefox this is an english lemmy community.
You may want try
@technologie@jlai.lu
a french community. Here is the list of most of french community are here : https://jlai.lu/communities