mp4 video rendering errors during annotation

**Describe the bug**
I wanted to use the "video object tracking" template to annotate a video, but I keep getting "video rendering errors" in the annotation user interface. I tried different .mp4 files and .webm file, on chrome and on firefox

**To Reproduce**
Steps to reproduce the behavior:
1. docker run -it -p 8080:8080 -v `pwd`/mydata:/label-studio/data heartexlabs/label-studio:latest
2. Create new project
3. Choose "video object tracking"
4. Import files (successful, ~14 mins)
5. Go to annotation interface
6. See error

**Expected behavior**
Help me solve the problem, thanks!

**Screenshots**

**Environment (please complete the following information):**
- OS: [e.g. MacOS M3]
- Label Studio Version [latest]

**Additional context**
N/A