Video hashing for v0.7.* compatibility should be improved

[prof79]

Bug Description

Video hashing should be improved so identical videos downloaded with v0.7.* and v0.8.2+ also hash the same. That was the original intention but I botched it.

Actual behavior

Downloaded videos may hash differently although they are the same from a content perspective.

Environment Information

• Operating System: all
• Fansly Downloader Version: v0.8.2, v0.8.3
• Fansly Downloader Type: all
• Specific creators name: all

Impact

Duplicate videos might get downloaded.

Additional context

Getting hold of ISO MPEG-4 Part 12 and 14 standards would be very helpful.
mdat parts that are identical should be singled out and the rest ignored, trak parts should be analyzed for pointers.
Directory with some useful documents added.