If a video fails to load, you may lack the necessary system codecs. Installing a universal codec pack (like K-Lite Codec Pack) usually resolves this.
At least 100 MB of free storage space for installation. Step-by-Step Installation Guide (AllPCWorld Routine) boilsoft video joiner 919 allpcworld install
Combine AVI, MPEG, MPG, VOB, RM/RMVB, 3GP, ASF, WMV, WMA, MP4, MP4A, MKV, FLV, and more. If a video fails to load, you may