We realized that when you add more than one video in a text (eg. content of a page) and you want to edit the second video by clicking on it and then choosing the "multimedia" icon and you edit something, the first video will be automatically replaced by the second video and the edits will effect the first video instead of the one that you wanted to edit. 

It seems like the "edit" mode is just taking the first video instead of the selected one. 

How to reproduce:

1. Go into a Moodle course
2. Create a page activity
3. Go to the content Tiny MCE Editor
4. Add two different videos
5. select the second video by clicking on it
6. click the multimedia icon in the tool bar
7. change for example the size
8. Update media
9. Watch the magic that is happening ==> the first video will be exchanged with the second video and the edits that were meant to affect the second video