Their site recommends the following plugin for images/files but not sure how to install it:

http://www.moxiemanager.com

Yep, but it's not free so it can't be added to Arastta as default.

But Arastta also has a quite descent image manager included allready, so I guess it's "just" a matter of getting it fired up inside TinyMCE by adding a browse button to the image/video insert (URL field). Isn't it what's done for Sumernote?

I'm digging in this, and have found out some parts...

I got the advanced tab added and working for image insert/edit, and I also have a browse button on the URL field, but need to figure out what the correct call to filemanager.php would be.

Anyhow for summernote there is a override for the image browser: https://github.com/arastta/arastta/blob/master/admin/view/javascript/common.js#l287-l312

For TinyMCE we need to replace this line https://github.com/arastta/arastta/blob/master/admin/view/javascript/common.js#l671 with those lines:

			language: editor_language,

            image_advtab: true,

            file_browser_callback : "myCustomFileBrowser"

Where "myCustomFileBrowser" should be replaced with a working function... anyone who see what we need to do here, maybe write a new function?

Edit: Javascript isn't my thing, but found this doc: http://www.tinymce.com/wiki.php/tinymce3x:how-to_implement_a_custom_file_browser

Me thinking out load... going slightly of topic...

If TinyMCE isn't fully integrated into Arastta, it shouldn't be in core, but better proposed as "core supported" extension. It would probably be the safest path anyway, as then the users could use any of those fully loaded CKEditor's available for OC, without having to modify them first. The changes done to get TinyMCE into Arastta seems to have broken the compatibility for those extensions.

Cüneyt is writing some new triggers for editors so will check this after that, most probably next week.

Added it as an issue since it seems forgotten: https://github.com/arastta/arastta/issues/334