To convert MP4 files to other formats:

1. Open the desired video editing software.

2. Import or drag-and-drop your MP4 file(s) into the program's timeline.

3. Navigate to the 'File' menu and select 'Export As...' (or a similar option depending on your software).

4. In the subsequent export window, choose an output format from the dropdown list that matches what you want for your exported video.

5. Select any additional settings as needed before clicking 'Save' or whatever button completes exporting your file.

Alternatively, if using free online tools:

1. Upload your MP4 files to a conversion website via its upload tool.

2. Choose an output format from the provided options that suits what you want for your exported video.

3. Click on the 'Convert Now!' or equivalent button located below where you selected your desired output format.

If neither of these methods work:

1. Ensure your computer has all necessary codecs installed to play MP4 files properly. You can download free codec packs like VLC Media Player, which includes everything needed for playback and conversion.

2. Try re-downloading the original video in a different format since corruption during downloading could be causing compatibility issues.

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