"can you make a tutorial on how to add music too the music player?"
its probably other ways to do it but this is how i do it. you gotta download this first (it lets you download music from tumblr) then search for a song you like in the tags or upload a song.
now you have a download option
click it, right click the player, then click “copy video url”
then post the url on to the music player
"whenever i try to upload a gif it says there is an error uploading it, can you help me?"
It might be over the limit
When you go into save for web & device, click this
click optimize to file size then choose a desired file size (anything under 1mb)
it’ll lower the file size for you