Step 1. Add the M2TS file
Download, install and launch this Free M2TS Converter on your Windows PC. Click the Add File button on the menu bar to load your M2TS files.

Step 2. Edit the M2TS file
Click Edit button on the top of the interface to start editing M2TS file. You can select the theme, edit title, author, time and provider in opening and ending.

Step 3. Preview the file
Click Next button to enter the preview window and preview the video. Then, click Save to save those changes.

Step 4. Convert the M2TS file
Select the format you want under Output format. After that, click Convert button to start converting M2TS file.

Then, you can get your final M2TS file and then post it online for sharing.

More Reading： https://www.free-videoconverter.net/video-editing/edit-m2ts/