Hi everyone,
As a beginner I've made some scripts to display what's playing on youtube plus another script to switch to the youtube window.
Feel free to criticise my work so that I can improve 
.
Currently playing script :
set str to "" as string
if ((str is equal to str) and (application "Safari" is running)) then
tell application "Safari"
repeat with t in tabs of windows
tell t
if URL starts with "https://www.youtube.com/watch" then
set tmp to name of t as string
set str to text 1 thru -11 of tmp
end if
end tell
end repeat
end tell
end if
return str
Switch to window script :
tell application "Safari"
repeat with w in windows
repeat with t in tabs of w
tell t
if URL starts with "https://www.youtube.com/watch" then
set current tab of w to t
activate
return true
end if
end tell
end repeat
end repeat
end tell
return false
I've made some improvements.
You'll find the new script I've made for Youtube
(Now it will display and go to the first Youtube window playing)
Currently playing script
set str to "" as string
if ((str is equal to str) and (application "Safari" is running)) then
tell application "Safari"
repeat with t in tabs of windows
tell t
if URL starts with "https://www.youtube.com/watch" then
set state to do JavaScript [¬
"document", ¬
".querySelectorAll('div[class*=\"-mode\"]')[0]", ¬
".className", ¬
".match(/(playing|paused|ended)-mode/)[1]"] ¬
as text
if state = "playing" then
set tmp to name of t as string
set str to text 1 thru -11 of tmp
end if
end if
end tell
end repeat
end tell
end if
return str
Switch to window script
tell application "Safari"
repeat with win in windows
repeat with t in tabs of win
tell t
if URL starts with "https://www.youtube.com/watch" then
set state to do JavaScript [¬
"document", ¬
".querySelectorAll('div[class*=\"-mode\"]')[0]", ¬
".className", ¬
".match(/(playing|paused|ended)-mode/)[1]"] ¬
as text
if state = "playing" then
set current tab of win to t
activate
return true
end if
end if
end tell
end repeat
end repeat
end tell
return false