Hi there! I want to make sure I understand your problem clearly. You mentioned that when you type something in Videoleap on your Mac with OS X 10.15.7, the app crashes. You also said you can't reverse videos. Is that right?

Could you please tell me:
- When did this issue start? Was it after an update or a fresh install?
- Does the app crash every time you type or only sometimes?
- Are you using any special fonts or text features when it crashes?
- For the video reversing part, what steps do you follow, and what exactly happens—does the app freeze, crash, or just not reverse?

This info will help me guide you better. Meanwhile, some common fixes for Videoleap crashing and reversing problems include:

1. Check if you have the latest version of Videoleap installed. Developers frequently release bug fixes in updates. You can check the App Store on your Mac.

2. Restart your Mac to clear any temporary glitches in memory.

3. Ensure that your Mac has enough free storage space and RAM available; sometimes low resources cause app crashes during editing.

4. Try deleting and reinstalling Videoleap to ensure there aren’t any corrupted files causing the crash.

5. For reversing videos, make sure you follow the right steps:
- Import the video clip.
- Select the clip on the timeline.
- Find the reverse option (often under video effects or clip settings).
If the option doesn’t work or crashes the app, it might be related to a bug or system compatibility issue.

If you’ve tried some of these steps already, please let me know which ones, and I can assist you with more advanced troubleshooting tailored to your Mac OS version.

Looking forward to your reply so we can get this sorted out!