Question: He also joined the communist movement
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Answer: He also joined the communist movement.
If the above mentioned solutions cannot fix AVI file problems in Sony Vegas then the video file may be corrupted or there would be irregularities in the file contents which blocks from opening

Can you repeat this sentence, but add in punctuation?
If the above mentioned solutions cannot fix AVI file problems in Sony Vegas, then the video file may be corrupted or there would be irregularities in the file contents, which blocks from opening.
input: SystemBytes Win XP 2015 is rogue security software that will try to convince you that your computer is full of threats
fixed: SystemBytes Win XP 2015 is rogue security software that will try to convince you that your computer is full of threats.
input ---- They expected that the peasants would come and give away their land but it did not happen
output ---- They expected, that the peasants would come and give away their land, but it did not happen.
Add punctuation: Because it actually meant that their singing birds do not simply represent the border territory under their control as scientists previously thought but somehow mysteriously linked very closely with the growth of plants and spread their seeds In other words the singing of birds to promote healthy growth and development of plants
A: Because it actually meant that their singing birds do not simply represent the border territory under their control, as scientists previously thought, but somehow mysteriously linked very closely with the growth of plants and spread their seeds. In other words, the singing of birds to promote healthy growth and development of plants.
Question: Additionally there are more amazing factors why this particular band wagon is really worth getting on to
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Answer:
Additionally, there are more amazing factors why this particular band wagon is really worth getting on to.