15. A computing device comprising, a touchscreen display; one or more processors; and one or more computer readable storage media storing instructions that are executable by the one or more processors to perform acts comprising: playing a media file that includes video; detecting a user gesture performed on the touchscreen display while the video is playing; identifying, in a frame of the video, selected text based on the user gesture; determining a context associated with the selected text based on additional text that is within a predetermined distance from the selected text; modifying the selected text to create modified text based at least partly on the additional text; and automatically performing a follow-up action based on the modified text.
15. A computing device comprising, a touchscreen display; one or more processors; and one or more computer readable storage media storing instructions that are executable by the one or more processors to perform acts comprising: playing a media file that includes video; detecting a user gesture performed on the touchscreen display while the video is playing; identifying, in a frame of the video, selected text based on the user gesture; determining a context associated with the selected text based on additional text that is within a predetermined distance from the selected text; modifying the selected text to create modified text based at least partly on the additional text; and automatically performing a follow-up action based on the modified text. 18. The computing device of claim 15 , wherein identifying, in the frame of the video, selected text based on the user gesture comprises: determining positional data associated with the user gesture, the positional data identifying a position of the user gesture relative to the touchscreen display; extracting text from the frame of the video using optical character recognition to create extracted text; and correlating the extracted text with the positional data to identify the selected text.