1. A method performed by one or more server devices, the method comprising: receiving, using at least one processor of the one or more server devices, a comment associated with a first document, the comment corresponding to a first portion of the first document; determining, using the at least one processor of the one or more server devices, that a size of the first portion is greater than a threshold size; based on determining that the size of the first portion is greater than the threshold size, identifying, using the at least one processor of the one or more server devices, one or more second documents, each of the one or more second documents including a respective second portion that matches the first portion; storing, in a memory associated with the one or more server devices, the comment in association with the first document and the one or more second documents; and presenting, using the at least one processor of the one or more server devices, the comment and another comment in connection with a particular second document, of the one or more second documents, when the particular second document is accessed by a user, presenting the comment and the other comment in connection with the particular second document further including: generating a score for the comment based on a degree of match between the first portion and the respective second portion, generating another score for the other comment with respect to the particular second document based on a degree of match between the respective second portion and a third portion, of the first document, that differs from the first portion, the other comment being associated with the third portion, and presenting, in connection with the particular second document, the comment relative to the other comment, the comment and the other comment being ranked in an order that is based on the score and the other score.
1. A method performed by one or more server devices, the method comprising: receiving, using at least one processor of the one or more server devices, a comment associated with a first document, the comment corresponding to a first portion of the first document; determining, using the at least one processor of the one or more server devices, that a size of the first portion is greater than a threshold size; based on determining that the size of the first portion is greater than the threshold size, identifying, using the at least one processor of the one or more server devices, one or more second documents, each of the one or more second documents including a respective second portion that matches the first portion; storing, in a memory associated with the one or more server devices, the comment in association with the first document and the one or more second documents; and presenting, using the at least one processor of the one or more server devices, the comment and another comment in connection with a particular second document, of the one or more second documents, when the particular second document is accessed by a user, presenting the comment and the other comment in connection with the particular second document further including: generating a score for the comment based on a degree of match between the first portion and the respective second portion, generating another score for the other comment with respect to the particular second document based on a degree of match between the respective second portion and a third portion, of the first document, that differs from the first portion, the other comment being associated with the third portion, and presenting, in connection with the particular second document, the comment relative to the other comment, the comment and the other comment being ranked in an order that is based on the score and the other score. 6. The method of claim 1 , where the first portion includes at least one of video data or audio data; and where determining that the size of the first portion is greater than the threshold size includes: determining that the at least one of the video data or the audio data is associated with a duration that is greater than a threshold duration.