Using Gutenberg editor, is possible embed video from different sources: peertube, youtube, internet archive,..
Video from peertube
Iframe
For example if you want embed this video i your blog page or post: https://kolektiva.media/w/wXCiamhWuuyJYFuVxBuvk4
You have to click on Share, from the peertube platform

Copy the code:
<iframe title="O CAPITALISMO REPRIME O CORPO FEMININO" width="560" height="315" src="https://kolektiva.media/videos/embed/wXCiamhWuuyJYFuVxBuvk4" frameborder="0" allowfullscreen="" sandbox="allow-same-origin allow-scripts allow-popups allow-forms"></iframe>
In your noblogs account, in the block editor you have to insert a block /html o “custom html”: Paste your code and save.

This is the result:
Video da youtube
Select and add the block /video or Video, and you can paste the direct url
Video da internet archive
Select and add the block /video or Video. You have to copy and paste the link from “download options”, the link ending with .mp4 or .ogv