An elaborate guide on merging AVI files
AVI (Audio Video Interleave) serves as a multimedia file format utilized for producing and playing movies. You can merge AVI files to amalgamate various short clips and create 1 final full-length video. There are numerous programs that facilitate the merging of AVI files.
Procedure
Merging AVI Files Using VirtualDub

Get VirtualDub from the SourceForge website and proceed with its installation on your computer.

Start VirtualDub and open a video file by clicking on 'Open' in the File menu.

Locate and select the first AVI movie clip you wish to include, then click 'Open.' You've now added the initial AVI file for merging in VirtualDub.

Move the timeline slider to the end of the first clip.

Access the File menu and choose 'Append AVI Segment.' This will prompt the file browser to appear again, allowing you to pick the second movie clip.

Choose the second AVI file using the file browser, just as you did with the first one.
Click 'Open' to load the file into VirtualDub (it will appear at the end of the timeline, following the first clip).

Maintain the original video compression settings by selecting 'Video' and then choosing 'Direct Stream Copy.'

Apply identical audio compression settings by selecting 'Direct Stream Copy' from the Audio menu.

Save the combined AVI file by selecting 'Save As AVI' from the File menu and indicating the location where you wish to store the merged file.
Utilizing SolveigMM Video Splitter for AVI File Merging

Head to the SolveigMM website to download and install SolveigMM Video Splitter.

Initiate the Join Manager after launching the program by following these steps.
- Access the Tools menu.
- Hover over 'Join Manager.'
- Choose 'Show Join Manager.'

Click the Plus icon on the toolbar or press the Insert key on your keyboard to prompt the file browser window.

Navigate to the directory containing the AVI movie clips you wish to merge, then click 'Open' to incorporate the file in SolveigMM Video Splitter.

Continue adding files until the files list is populated with all the files you intend to merge.

Press the Join File icon (displaying a small green triangle in the middle) on the taskbar to merge the files.

Assign a name to the newly merged AVI file and save it to your preferred location by navigating to the destination folder and clicking 'Save.'
Combining AVI Files Using Quick AVI Joiner

Visit the Goldzsoft website to download and install Quick AVI Joiner on your computer.

Launch the software and click on the folder icon located on the left side of the taskbar. This action will open the file browser.

Utilize the file browser to add the AVI files you wish to merge in the desired sequence. You will observe the files being added to the file list in Quick AVI Joiner.

Press the Options button and choose 'Set Format as Selected File.' This action preserves the settings of the original clips and maintains consistency in the final output movie.

Click the Save icon (resembling a square blue floppy disc) to merge AVI files and store the resulting video in your desired destination folder.
Pointers
-
You can hold down the Ctrl (Control) key on your keyboard to select multiple files in the file browser window.