<s>
Periscope	B-Language
was	O
an	O
American	O
live	O
video	B-Application
streaming	I-Application
app	O
for	O
Android	B-Application
and	O
iOS	B-Application
developed	O
by	O
Kayvon	O
Beykpour	O
and	O
Joe	O
Bernstein	O
and	O
acquired	O
by	O
Twitter	B-Application
,	O
Inc	O
.	O
before	O
its	O
launch	O
in	O
March	O
2015	O
.	O
</s>
<s>
However	O
,	O
Periscope	B-Language
videos	O
can	O
still	O
be	O
watched	O
via	O
Twitter	B-Application
and	O
most	O
of	O
its	O
core	O
features	O
are	O
now	O
incorporated	O
into	O
the	O
app	O
.	O
</s>
<s>
Beykpour	O
and	O
Bernstein	O
came	O
up	O
with	O
the	O
idea	O
for	O
Periscope	B-Language
while	O
traveling	O
abroad	O
in	O
2013	O
.	O
</s>
<s>
He	O
wanted	O
to	O
see	O
what	O
was	O
happening	O
there	O
,	O
so	O
he	O
turned	O
to	O
Twitter	B-Application
.	O
</s>
<s>
Periscope	B-Language
was	O
acquired	O
January	O
2015	O
by	O
Twitter	B-Application
before	O
the	O
product	O
had	O
been	O
publicly	O
launched	O
.	O
</s>
<s>
The	O
acquisition	O
was	O
officially	O
announced	O
in	O
a	O
tweet	O
from	O
Periscope	B-Language
and	O
retweeted	O
by	O
Twitter	B-Application
CEO	O
Dick	O
Costolo	O
on	O
13	O
March	O
after	O
the	O
rival	O
video	B-Application
streaming	I-Application
app	O
Meerkat	B-Application
was	O
a	O
breakout	O
hit	O
at	O
South	O
by	O
Southwest	O
2015	O
(	O
13	O
–	O
17	O
March	O
)	O
.	O
</s>
<s>
Meerkat	B-Application
became	O
the	O
talk	O
of	O
SXSW	O
partially	O
due	O
to	O
Twitter	B-Application
cutting	O
Meerkat	B-Application
off	O
from	O
its	O
social	O
graph	O
just	O
as	O
the	O
festival	O
was	O
starting	O
.	O
</s>
<s>
Periscope	B-Language
was	O
launched	O
on	O
26	O
March	O
2015	O
.	O
</s>
<s>
Later	O
,	O
on	O
26	O
May	O
2015	O
,	O
Periscope	B-Language
was	O
released	O
for	O
Android	B-Application
.	O
</s>
<s>
On	O
12	O
August	O
2015	O
,	O
Periscope	B-Language
announced	O
that	O
it	O
had	O
surpassed	O
10	O
million	O
accounts	O
,	O
four	O
months	O
after	O
it	O
was	O
launched	O
.	O
</s>
<s>
On	O
9	O
December	O
2015	O
,	O
Apple	O
named	O
Periscope	B-Language
as	O
the	O
iPhone	O
App	O
of	O
the	O
Year	O
.	O
</s>
<s>
On	O
26	O
January	O
2016	O
,	O
the	O
company	O
released	O
an	O
update	O
that	O
allows	O
users	O
to	O
stream	O
live	O
from	O
GoPro	B-Device
.	O
</s>
<s>
In	O
December	O
2016	O
,	O
some	O
of	O
Periscope	B-Language
's	O
features	O
were	O
integrated	O
into	O
the	O
Twitter	B-Application
app	O
.	O
</s>
<s>
In	O
April	O
2016	O
,	O
as	O
part	O
of	O
a	O
wider	O
partnership	O
with	O
Twitter	B-Application
to	O
stream	O
selected	O
Thursday	O
Night	O
Football	O
games	O
,	O
the	O
NFL	B-Application
announced	O
that	O
Periscope	B-Language
would	O
feature	O
ancillary	O
behind	O
the	O
scenes	O
content	O
from	O
these	O
games	O
.	O
</s>
<s>
However	O
,	O
after	O
a	O
brief	O
interruption	O
,	O
C-SPAN	O
was	O
able	O
to	O
broadcast	O
the	O
sit-in	O
because	O
Rep.	O
Scott	O
Peters	O
streamed	O
the	O
activity	O
and	O
the	O
speakers	O
using	O
his	O
Periscope	B-Language
account	O
.	O
</s>
<s>
On	O
12	O
June	O
2018	O
,	O
a	O
Turkish	O
court	O
banned	O
Periscope	B-Language
in	O
Turkey	O
for	O
violating	O
the	O
copyright	O
of	O
the	O
Turkish	O
company	O
called	O
Periskop	O
.	O
</s>
<s>
Periscope	B-Language
had	O
been	O
actively	O
used	O
by	O
the	O
Turkish	O
opposition	O
until	O
an	O
initial	O
ban	O
was	O
put	O
in	O
place	O
in	O
April	O
2017	O
,	O
weeks	O
before	O
a	O
constitutional	O
referendum	O
to	O
expand	O
presidential	O
powers	O
.	O
</s>
<s>
The	O
services	O
of	O
Periscope	B-Language
were	O
available	O
in	O
the	O
mobile	O
application	O
itself	O
as	O
well	O
as	O
on	O
Twitter	B-Application
.	O
</s>
<s>
Users	O
of	O
Periscope	B-Language
were	O
able	O
to	O
choose	O
whether	O
or	O
not	O
to	O
make	O
their	O
video	O
public	O
or	O
simply	O
viewable	O
to	O
certain	O
users	O
such	O
as	O
their	O
friends	O
or	O
families	O
.	O
</s>
<s>
Although	O
the	O
"	O
scoper	O
"	O
usually	O
used	O
a	O
handheld	O
device	O
such	O
as	O
a	O
smartphone	O
to	O
broadcast	O
,	O
it	O
was	O
also	O
possible	O
to	O
broadcast	O
through	O
Periscope	B-Language
using	O
a	O
professional	O
vision	O
mixing	O
suite	O
such	O
as	O
Wirecast	B-Operating_System
or	O
Teradek	O
using	O
Periscope	B-Language
Pro	O
.	O
</s>
<s>
On	O
10	O
September	O
2015	O
,	O
Periscope	B-Language
added	O
the	O
ability	O
to	O
broadcast	O
live	O
in	O
landscape	O
view	O
.	O
</s>
<s>
Periscope	B-Language
allowed	O
viewers	O
to	O
send	O
"	O
hearts	O
"	O
to	O
the	O
broadcaster	O
by	O
tapping	O
on	O
the	O
mobile	O
screen	O
as	O
a	O
form	O
of	O
appreciation	O
.	O
</s>
<s>
On	O
8	O
September	O
2015	O
,	O
TechCrunch	O
reported	O
and	O
later	O
confirmed	O
that	O
Periscope	B-Language
was	O
building	O
an	O
Apple	B-Device
TV	I-Device
app	O
.	O
</s>
<s>
The	O
app	O
could	O
be	O
misappropriated	O
for	O
copyright	O
infringement	O
,	O
an	O
issue	O
that	O
was	O
raised	O
around	O
the	O
time	O
of	O
the	O
app	O
's	O
launch	O
when	O
several	O
users	O
of	O
the	O
service	O
used	O
it	O
to	O
air	O
the	O
fifth-season	O
premiere	O
of	O
HBO	O
's	O
Game	B-Application
of	I-Application
Thrones	I-Application
live	O
.	O
</s>
<s>
These	O
issues	O
were	O
magnified	O
further	O
by	O
a	O
professional	O
boxing	O
event	O
on	O
2	O
May	O
2015	O
,	O
Floyd	O
Mayweather	O
Jr.	O
vs.	O
Manny	O
Pacquiao	O
,	O
which	O
was	O
televised	O
via	O
a	O
pay	O
per	O
view	O
that	O
cost	O
approximately	O
US$90	O
,	O
but	O
saw	O
wide	O
unauthorised	O
distribution	O
through	O
streams	O
of	O
various	O
quality	O
on	O
Periscope	B-Language
.	O
</s>
<s>
Rebroadcasting	O
copyrighted	O
content	O
violates	O
Periscope	B-Language
's	O
written	O
terms	O
of	O
service	O
,	O
and	O
could	O
result	O
in	O
suspension	O
or	O
banning	O
the	O
offending	O
account	O
.	O
</s>
<s>
Other	O
complaints	O
came	O
from	O
firms	O
acting	O
on	O
behalf	O
of	O
the	O
NFL	B-Application
,	O
the	O
Premier	O
League	O
,	O
the	O
US	O
Open	O
Tennis	O
Championship	O
,	O
and	O
Taylor	O
Swift	O
,	O
according	O
to	O
data	O
from	O
Chilling	B-Application
Effects	I-Application
,	O
which	O
tracks	O
online	O
takedown	O
notices	O
and	O
was	O
started	O
by	O
an	O
attorney	O
Wendy	O
Seltzer	O
,	O
several	O
law	O
school	O
clinics	O
and	O
the	O
Electronic	O
Frontier	O
Foundation	O
.	O
</s>
<s>
The	O
Ultimate	O
Fighting	O
Championship	O
,	O
which	O
kept	O
a	O
close	O
eye	O
on	O
people	O
it	O
believes	O
are	O
illegally	O
streaming	O
its	O
pay	O
per	O
view	O
mixed	O
martial	O
arts	O
matches	O
,	O
sent	O
more	O
than	O
650	O
takedown	O
notices	O
to	O
Periscope	B-Language
,	O
according	O
to	O
data	O
from	O
Chilling	B-Application
Effects	I-Application
.	O
</s>
<s>
The	O
services	O
of	O
Periscope	B-Language
,	O
a	O
live	O
video	B-Application
streaming	I-Application
program	O
introduced	O
in	O
2015	O
,	O
were	O
scheduled	O
to	O
end	O
in	O
March	O
2021	O
.	O
</s>
<s>
Periscope	B-Language
has	O
been	O
used	O
for	O
a	O
variety	O
of	O
things	O
,	O
including	O
disseminating	O
breaking	O
news	O
,	O
personal	O
vlogging	O
,	O
and	O
live	O
streaming	O
of	O
events	O
.	O
</s>
<s>
It	O
was	O
removed	O
from	O
its	O
respective	O
stores	O
in	O
Android	B-Application
and	O
iOS	B-Application
on	O
31	O
March	O
2021	O
.	O
</s>
<s>
However	O
,	O
the	O
videos	O
of	O
the	O
service	O
can	O
still	O
be	O
watched	O
via	O
Twitter	B-Application
,	O
as	O
most	O
of	O
its	O
features	O
are	O
now	O
incorporated	O
into	O
the	O
app	O
.	O
</s>
<s>
Periscope	B-Language
failed	O
to	O
reclaim	O
its	O
market	O
share	O
despite	O
attempts	O
to	O
enhance	O
its	O
functionality	O
and	O
user	O
interface	O
.	O
</s>
