Clips Changing Aspect Ratios When I Press Play

[#1]

I have attached a screen recording of how the preview looks vs. what happens when I press play on the footage. You'll see that the clip ratio automatically shrinks when not in still preview mode. 

This is not an issue with the project as a whole as I have several other sequences that aren't having this issue.

There is other footage that I've imported (graphics) that don't change ratios when I press play, but these have pesonal client info and names so I did not include them. 

Please help, I'm completely lost.

[#2]

I have attached a screen recording of how the preview looks vs. what happens when I press play on the footage. You'll see that the clip ratio automatically shrinks when not in still preview mode. 

This is not an issue with the project as a whole as I have several other sequences that aren't having this issue.

There is other footage that I've imported (graphics) that don't change ratios when I press play, but these have pesonal client info and names so I did not include them. 

Please help, I'm completely lost.

[#3]

[#4]

Sorry, it won't let me edit or delete. Ignore this post - I have solved it.

[#5]

please post how you solved it so if someone else has the same problem...

[#6 · Accepted solution]

Solved: I changed my sequence settings to square pixels (it was set to HD Anamorphic) and then resized the sequence to match the clip that was having the issue. (16:9)