Videos take ages to load

### Steps to reproduce

1. Try to play a video.

### Outcome

#### What did you expect?

Video loads quickly and plays.

#### What happened instead?

1. The video shows a loading spinner for good 5 minutes, in the process Element thinks it's disconnected from the server.
2. The video starts very slowly actually loading.
3. Until the video has completely loaded, Element still thinks it's disconnected from the server and doesn't show any new messages even in other chats.

### Operating system

Fedora Silverblue 37

### Browser information

Firefox 107.0.1 from Flathub

### URL for webapp

gnome.element.io

### Application version

_No response_

### Homeserver

gnome.org

### Will you send logs?

Yes